Presentation on theme: "EARN EXTRA POINTS TOWARDS YOUR SCIENCE FINAL GRADE"— Presentation transcript:

WHAT IS DISTANCE? A. It is the length of a path between two places.
B. It is the length of time between two places. C. It is the direction of the path between two places. D. It is the unit used to measure length.

HOW IS SPEED DEFINED? A. Time divided by distance B. Time divided by direction C. Distance divided by time D. Distance divided by direction

A. 55 miles per hour B. 40 miles per hour C. 25 miles per hour
WHAT IS THE AVERAGE SPEED OF A TRUCK THAT TRAVELED 120 MILES IN 3 HOURS? A. 55 miles per hour B. 40 miles per hour C. 25 miles per hour D. 4 miles per hour

WHAT IS THE DIFFERENCE BETWEEN SPEED AND VELOCITY?
A. Speed includes direction and velocity does not. B. Velocity includes direction and speed does not. C. Neither include direction. D. Speed and velocity are the same.

WHICH OF THESE HAS THE GREATEST VELOCITY?
A. a cheetah running north at 30 m/s B. a balloon rising upward at 20 m/s C. a truck moving south at 35 m/s D. a dog walking east at 3 m/s

A. 50 mph B. 50 mph eastward C. 25 mph D. 25 mph eastward
WHAT IS THE VELOCITY OF A CAR THAT DRIVES EAST FOR 2 HOURS AT A CONSTANT SPEED OF 50 mph? A. 50 mph B. 50 mph eastward C. 25 mph D. 25 mph eastward

A. the same speed? B. the same velocity? C. both? D. neither?
DOES A DOG RUNNING SOUTH AT 2 m/s AND A BALL ROLLING SOUTH AT 2 m/s HAVE: A. the same speed? B. the same velocity? C. both? D. neither?

A BALLOON MOVES UPWARD A DISTANCE OF 4 m IN 2 s
A BALLOON MOVES UPWARD A DISTANCE OF 4 m IN 2 s. WHAT IS THE BALLOON’S VELOCITY? A. 2 m/s B m/s C. 2 m/s upward D m/s upward

WHICH OF THESE HAS TO OCCUR FOR A CHANGE IN VELOCITY TO TAKE PLACE?
A. A change of speed B. A change of direction C. A change in both speed or direction D. None of these

Why is force considered a vector quantity?
A. Its size can be measured in newtons. B. It acts in a particular direction. C. It can be balanced. D. Its measurement is both size and direction.

A girl standing on the ground exerts a force on the ground of 490 newtons. Which best describes the force she exerts on the ground? A newtons B newtons downward C newtons sideways D newtons upwards

Which of the following forces has the smallest size?
A. a 20 N force acting east B. a 50 N force acting up C. a 70 N force acting west D. a 70 N force acting down

A boy pushes a box 50 N east and a girl pushes a chair 50 N west
A boy pushes a box 50 N east and a girl pushes a chair 50 N west. How do the two forces compare? A. The forces have the same size but different direction. B. The forces have the same size and same direction. C. The forces have a different size and direction. D. None of the above

A toy rocket is launched straight up into the air with a force of 16N
A toy rocket is launched straight up into the air with a force of 16N. The weight of the rocket, 4 N, pulls down on the rocket. What is the net force on the rocket when its launched? A. 4 N upward B. 12 N upward C. 16 N downward D. 20 N downwards

Two people push on a ball from opposite sides
Two people push on a ball from opposite sides. One exerts a force of 80 N and the other exerts a force of 60 N. What is the size of the force? A. 20 N B. 40 N C. 60 N D. 100 N

When are forces on an object balanced?
A. When the combined forces are identical in size and direction. B. When the combined forces are smaller than the balanced force. C. When the combined forces are larger than the balanced force. D. When the combined forces have the same effect as no force.

A static object is able to remain at rest because:
A. The force of gravity is always acting on it. B. Balanced forces are acting on it. C. Compression forces are acting on it. D. Tension keeps it from being pulled apart.

You put a plate on the table. What are the forces acting on the plate?
A. Friction & gravity B. Friction & elastic forces C. Gravity & elastic forces D. Gravity & tension

Which shows the cumulative effect of forces?
A. The speed of a ball after being hit by a bat B. The length of a shadow C. The volume of a cereal box after it’s opened D. The average time of a marathon’s runners

What is the average speed of a truck that travels 180 km in 2 hours?
A. 90 km/h B. 90 km/2h C km/h D km/h

A train is traveling west at 50 km/h
A train is traveling west at 50 km/h. A few minutes later, the tracks change direction and the train travels south at the same speed. Which statement is true? A. The speed of the train changed. B. The average speed of the train changed. C. The velocity of the train stayed the same. D. The velocity of the train changed.

If a car travels 20 miles in 20 minutes, you can calculate its:
A. Velocity B. Average speed C. Direction D. Change in speed

The distance vs. time graph for an object traveling at a constant speed is a:
A. Curved line B. Horizontal line C. Vertical line D. Diagonal line

A short stack and a taller stack of books is pushed across a desk
A short stack and a taller stack of books is pushed across a desk. Which statement is true about the force needed to push each stack? A. Greater force is needed to push the short stack. B. Greater force is needed to push the taller stack. C. The force required to move each stack is the same. D. All forces are unbalanced.

Which statement is true about all forces?
A. All forces cause acceleration. B. All forces cause a change in motion. C. All forces have magnitude and direction. D. All forces are unbalanced.

Which jar requires the most force to lift it?
A. A jar full of cotton balls B. A jar full of plastic foam chips C. A jar full of pennies D. A jar full of sawdust

Earth is a sphere because:
A. it is much less massive than the sun. B. it is millions of miles from the sun. C. gravity pulls any bulges toward the center. D. there was not enough gravity for it to become a star.

Which result occurs when balanced forces act on an object?
A. Its state of motion does not change. B. It changes direction. C. It slows down. D. It speeds up.

A ball rolls slowly toward a person who then kicks the ball hard in the same direction it had been rolling. What happens to the motion of the ball? A. The ball speeds up. B. The ball slows down. C. The ball continues at the same speed. D. The ball travels at the same speed but changes direction.

A boy pushes a wagon that is rolling down a hill so that it will roll faster. Which of the following describes the force the boy applies? A. a balanced force B. a force in the direction of the wagon’s motion C. a force in the direction opposite of the wagon’s motion D. a force at the right angle to the wagon’s motion

A bicycle turns around a corner
A bicycle turns around a corner. What can be said about the forces on the bicycle as it turns? A. The forces are balanced. B. The forces are unbalanced. C. There are no forces on the bicycle. D. Nothing. There is not enough information.

A soccer player stops a rolling ball with her foot
A soccer player stops a rolling ball with her foot. What kind of force or forces could she have applied? A. two balanced forces B. a force underneath the ball C. a force in the direction of the ball’s motion D. a force in the direction opposite of the ball’s motion

A box sliding along the floor comes to a stop. Why?
A. gravity B. rolling friction C. no forces, it just came to a stop. D. sliding friction and gravity

If you increase the force you exert on an object, you will
A. decrease its mass B. increase its mass C. decrease its acceleration D. increase its acceleration

You are in an elevator moving upward from the second floor to the ninth. From the reference point of the elevator, you are A. going up B. going down C. not moving D. changing velocity

A family drives across the state to visit relatives
A family drives across the state to visit relatives. They drive for one hour at 60 km/h and one hour at 90 km/h. What is their average speed? A. 30 km/h B. 60 km/h C. 75 km/h D. 150 km/h

You exert a force to push a box across the floor
You exert a force to push a box across the floor. You exert the same amount of force to pull the box back. How are the two forces different? A. The direction is different. B. The amount of force is different. C. The pushing force is balanced, but the pulling force is unbalanced. D. The forces are not different.

Two students push equally on a box in opposite directions
Two students push equally on a box in opposite directions. What happens to the box? A. The box moves to the right. B. The box moves to the left. C. The box does not move. D. The box tips over.

Which of the following keeps a bag of sand connected to a spring scale?
A. The downward pull of gravity B. The elastic force of the spring C. The upward push of gravity D. The mass of the sand bag

Which force causes the downward curving motion of a basketball in flight?
A. The balanced force exerted by the basketball player B. The balanced force of gravity C. The unbalanced force exerted by the basketball player D. The unbalanced force of gravity

Which force is responsible for the formation of the planets?
A. gravity B. friction C. elastic D. acceleration

If you exert the same force on an object with low mass and an object with a higher mass, what will happen? A. The object with lower mass will increase its mass. B. The object with the higher mass will increase in mass. C. The object with lower mass will have greater acceleration. D. The object with higher mass will have greater acceleration.

A 1-kilogram object accelerates when a force of 10 newtons acts on it
A 1-kilogram object accelerates when a force of 10 newtons acts on it. If the force doubles in size, the acceleration will A. increase B. decrease C. stay the same D. become zero

The force of gravity causes
A. any two objects to attract one another. B. any two objects to repel one another. C. any two objects to decrease in mass. D. any two objects to increase in mass.

Friction is a force that
A. opposes an object’s motion. B. does not exist when surfaces are very smooth. C. decreases with larger mass. D. all of the above

Rolling friction A. is usually less than sliding friction.
B. makes it difficult to move objects on wheels. C. is usually greater than sliding friction. D. is the same as fluid friction.

If Earth’s mass doubled, your weight would
A. increase because gravity increased. B. decrease because gravity increased. C. increase because gravity decreased. D. not change because you are still on Earth.

A Force A. is expressed in newtons
B. can cause an object to change speed. C. is a push or a pull. D. all of the above

If passengers on an airplane watch another plane passing them, their reference point is the
A. sky. B. ground. C. other plane. D. plane they are on.

Two forces act on an object. One force is 10 N north
Two forces act on an object. One force is 10 N north. The other is 5 N south. The object experiences a net force of A. 5 N south B. 15 N north C. 50 N north D. 5 N north

When velocity decreases, this could be referred to as
A. acceleration. B. deceleration. C. negative acceleration. D. all of the above

The moving blades on a windmill are an example of
A. centripetal acceleration. B. positive acceleration. C. negative acceleration. D. deceleration.

Which of the following is NOT an example of a force being exerted?
A. pushing a door open B. typing on a computer keyboard C. sitting in a chair D. none of the above

Balanced forces applied to an object
A. produces a net force of zero. B. changes the direction of a moving object. C. causes an object at rest to start moving. D. produces a negative force.

The gravitational force of the Earth in relation to the gravitational force of everything else on Earth represent a(n) ______ that causes everything to fall toward the center of the Earth. A. unbalanced force B. balanced force C. centrifugal force D. centripetal force

The planets are held in their orbit by _____ forces.
A. balanced B. unbalanced C. centrifugal D. centripetal

You are training to run the 100 m race at a track and field meet
You are training to run the 100 m race at a track and field meet. You time yourself and find you can run it in 10 seconds. How fast are you able to run it? A. 1 m/s B. 10 m/s C. 100 m/s D 1000 m/s

You ride your bike north for 100 m at a constant speed of 5 m/s
You ride your bike north for 100 m at a constant speed of 5 m/s. Your acceleration is A. 5 m/s/s forward B. 20 m/s/s forward C. 100 m/s/s forward D. There is no acceleration.

The air that comes out of the tiny holes of an air-hockey table is an example of
A. net friction B. friction C. gas lubricant D. liquid lubricant

You ride your bike around the block at an average speed of 11 km/h
You ride your bike around the block at an average speed of 11 km/h. What changes? A. your velocity B. your acceleration C. Both A and B D. Neither A nor B

Your class and another class have a tug-of-war contest
Your class and another class have a tug-of-war contest. For your class to win, your class must A. create a balanced force with the other class. B. have a greater force in the opposite direction. C. have a greater force in the same direction. D. create a net force of zero with the other class.

One Saturday, you go on a picnic
One Saturday, you go on a picnic. Although there is a slight breeze, the napkins stay on the tablecloth because of A. sliding friction B. rolling friction C. fluid friction D. static friction

An autumn breeze blows leaves from the trees
An autumn breeze blows leaves from the trees. Although the leaves are flying through the air, they are still experiencing A. sliding friction B. rolling friction C. fluid friction D. static friction

Venus and Earth have nearly the same mass
Venus and Earth have nearly the same mass. Therefore the gravitational pull from the sun is approximately A. the same for both. B. greater for Venus because it’s closer to the sun. C. less for Venus because it’s closer to the sun. D. greater for Earth because it’s farther from the sun.

A feather and a rock dropped at the same time from the same height would land at the same time when dropped A. by Galileo in Italy. B. by Newton in England. C. by an astronaut on the moon. D. by an astronaut in the space shuttle.

An object is in projectile motion if
A. it is thrown on a horizontal path. B. it is accelerated downward by gravity. C. it does not accelerate horizontally. D. all of the above

Newton’s first law of motion applies
A. to moving objects. B. to objects that are not moving. C. Both A and B D. Neither A nor B

Galileo proved that the rate at which an object falls
A. increases with an increase in mass. B. decreases air resistance. C. is not affected by mass. D. increases with a decrease in mass.

Parachutes slow skydivers to a safer terminal velocity because parachutes
A. increase air resistance. B. decrease air resistance. C. increase gravitational pull. D. decrease gravitational pull.

Newton’s third law of motion states that if a force is exerted on an object, another force occurs that A. is equal in size and opposite in direction. B. is in the same direction and size. C. is equal in speed and opposite in direction. D. is in the same direction and speed.

You, sitting in a chair, is an example of Newton’s
A. second law. B. first and third laws. C. second and third laws. D. first and fourth laws.

An object is falling through the air at a constant rate
An object is falling through the air at a constant rate. Which force is balanced with the force of gravity? A. Frictional force B. Tension force C. Elastic force D. Centripetal force

You have a container with 20N of water
You have a container with 20N of water. After a rock is added, the weight of the water and the rock is 23N. What is the bouyant force on the rock? A. 0 N B. 3 N C. 23 N D. 43 N