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**A science class takes a toy cart and rolls it down an incline**

A science class takes a toy cart and rolls it down an incline. They measure the distance the cart travels. The investigation is repeated changing the angle of incline of the ramp. The mass of the cart and the length of the ramp are kept constant. What is the relationship being studied?

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**For 1000 points The effect of the angle of incline of the ramp on distance the cart travels.**

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**A science class takes a toy cart and rolls it down an incline**

A science class takes a toy cart and rolls it down an incline. They measure the distance the cart travels. The investigation is repeated changing the angle of incline of the ramp. The mass of the cart and the length of the ramp are kept constant. What are the dependent and independent variables?

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**For 15000 points dependent variable – distance cart travels independent variable – angle of incline**

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**Write the general mathematical question for each graph depicted below.**

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**For 500 points a. y = b b. y2 = mx + b c. y = m(1/x) + b d**

For 500 points a. y = b b. y2 = mx + b c. y = m(1/x) + b d. y = mx + b e. y = mx2 + b

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**How would you make a straight line graph for the data below?**

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**For 800 points Invert the volume values**

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**What is the relationship between the variables for the graph below.**

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**For 400 points Pressure is inversely proportional to volume**

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**Explain the relative motion for the two objects below.**

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For 200 points Object 2 moves slower than object 1 and moves toward the origin, while object 1 moves away from the origin.

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**Explain the relative motion of the two objects in the graph below.**

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For 1000 points Object 2 is not moving, while object 1 moves at a constant speed away from the origin.

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**Describe the relative motion for the two objects in the graph below.**

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**For 6000 points Objects 1 and 2 move at the same speed.**

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**What is the average speed for the object shown in the graph below?**

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For 600 points 5 m/s

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**How far did the car below travel in 3 seconds?**

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For 500 points 75 m

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What is speed?

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For 400 points Speed is the distance covered per unit of time, or a measure of how fast an object is moving

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**What value is obtained by looking at the speedometer in a moving car?**

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**For 800 points instantaneous speed**

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**If you take a trip that covers 200 km in 4 hours, what is your average speed?**

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For 200 points 50 km/h

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**What is the pair to the force of a ball pulling on the earth?**

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**For 800 points The earth pulling on the ball**

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If a horse exerts a force of 350 N on a wagon to make it accelerate, what force does the wagon exert on the horse?

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For points 350 N

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**What is the law of inertia?**

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For 4000 points An object in motion will stay in motion and an object at rest will stay at rest unless acted on by an outside force.

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**After a cannonball is fired into frictionless space, how much force is required to keep it going?**

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**For 500 points No force is required to keep it going, only to stop it**

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What causes friction?

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For 5000 points Friction is caused by microscopic bumps that act as obstructions to the object’s motion and always acts opposite of motion.

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**A 15-N force and a 30-N force at on an object in opposite directions**

A 15-N force and a 30-N force at on an object in opposite directions. What is the net force on the object?

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For points 15 N

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**When does equilibrium occur?**

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**For 8000 points When the net forces acting on the object are zero, or balanced.**

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A girl whose weight is 400 N hangs from the middle of a bar supported by two vertical strands of rope. What is the tension in each strand?

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For 7000 points 200 N

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An object weighs 40 N on earth and another object weighs 40 N on the moon. What can you say about their relative masses?

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**For 40000 points The object on the moon has a greater mass.**

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**What causes acceleration?**

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**For 400 points A net force greater than zero.**

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**When the mass of an object increases, what happens to the acceleration of an object?**

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**For 4000 points The acceleration decreases.**

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**How are acceleration and net force on an object related?**

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For 800 points The acceleration of an object is directly proportional to the magnitude of the net force.

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**A girl pulls on a 5 kg wagon with a constant force of 25 N**

A girl pulls on a 5 kg wagon with a constant force of 25 N. What is the wagon’s acceleration?

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For 500 points 5 m/s2

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If the force of friction on a sliding object is 30 N, what is the force needed to maintain a constant velocity?

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For points 30 N

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**If the force acting on a cart doubles, what happens to the cart’s acceleration?**

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For 200 points It doubles.

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**Suppose a cart is being moved by a force**

Suppose a cart is being moved by a force. If suddenly a load is dumped into the cart so that the cart’s mass doubles, what happens to the cart’s acceleration?

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For 600 points It halves.

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**A player hits a ball with a bat**

A player hits a ball with a bat. The action force is the impact of the bat against the ball. What is the reaction to this force?

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**For 2000 points The force of the ball against the bat**

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A person is attracted towards the center of Earth by a 500-N gravitational force. What is the force with which the Earth is attracted to the person?

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For 4000 points 500 N

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**What causes resistance?**

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**For 5000 points internal friction**

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**Two spheres A & B are projected off the edge of a 2**

Two spheres A & B are projected off the edge of a 2.0 m high table with the same horizontal velocity. Sphere A has a mass of 10. g and sphere B has a mass of 5 g. How do their landing times compare?

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**For 12000 points They are the same**

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**Sphere A is projected off the edge of a 1**

Sphere A is projected off the edge of a 1.0 m high bench with a horizontal velocity of 2.0 m/s. Sphere B is dropped from the same height as Sphere A. Both spheres have the same size and mass. How do their landing times and velocities compare?

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**For 3000 points They are the same.**

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**A truck is moving at constant speed**

A truck is moving at constant speed. Inside the storage compartment, a rock is dropped from the midpoint of the ceiling and strikes the floor below. Does it strike the floor behind where it was dropped, in front of where it was dropped, or directly below?

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**For 8000 points directly below**

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A diver running at 3.6 m/s dives out horizontally from the edge of a 31 m high cliff. How far from the base of the cliff does the diver hit the water?

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For 6000 points 9 m

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What happens to the acceleration of the object when it changes from the picture on the right to the picture on the left?

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**For 30000 points the acceleration increases**

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What happens to the acceleration of the object when it changes from the picture on the right to the picture on the left?

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**For 800 points It does not change.**

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**How does the average velocity for objects A and B compare for the time interval 0 to 5 seconds?**

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For 8000 points A = B

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**How does the instantaneous velocity for A and B compare at t = 5 s?**

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For 5000 points A > B

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**How does the acceleration of object A compare to the acceleration of object B at t = 5 s?**

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**For 4000 points Acceleration of B > A**

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**How does the displacement of A compare to B at t = 5 s?**

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For points A = B

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**How does the average velocity for objects A and B compare for the time interval from 0 to 5 s?**

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For points A = B

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**How does the instantaneous velocity of objects A and B compare at t = 5 s?**

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For points A > B

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**Draw the velocity vs. time graphs for the following position vs**

Draw the velocity vs. time graphs for the following position vs. time graphs

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For points

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Forces Standard: S8P3 b. Demonstrate the effect of balanced and unbalanced forces on an object in terms of gravity, inertia, and friction.

Forces Standard: S8P3 b. Demonstrate the effect of balanced and unbalanced forces on an object in terms of gravity, inertia, and friction.

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