Motion Newton’sLaws Friction Forces in Fluids SimpleMachines Potential and KineticEnergy $ $ $ $ $ $ $ $ $ $500.00

Look at the diagram. What can be said of the car’s motion at B? What is stopped? Back to you Alex

An empty aluminum soda can is heated for several minutes with a high wattage hair dryer, causing the heated, energized particles of air inside the can to escape through the opening. The can’s opening is quickly sealed with strong tape. What will happen as the can cools? What it is crushed or implodes? Back to you Alex

According Newton’s 2nd Law, if there is an increase in force, what will happen to the acceleration of the object? What is it increases? Back to you Alex

The following is an example of which of Newton’s laws? In a balloon car, the action is the expelling air. The reaction is the movement of the car forward. What is Newton’s 3 rd law? Back to you Alex

What is the net force of a combined force of 7N north with a force of 15 N south? What is 8 N south? Back to you Alex

Why does a helium-filled balloon float in air? What is helium is less dense than air? Back to you Alex

Determine the average velocity of the race car whose data is shown below. TimeDistance What is 96 m/s? Back to you Alex

Which correctly shows a wedge? What is A? Back to you Alex A.B.C.

A student wants to lift a 50 kg box. She has four pulleys and a 20 m length of rope. Which arrangement would have the greatest mechanical advantage? a. 1 pulley b. 2 pulleys c. 3 pulleys d. 4 pulleys What is 4 pulleys ? Back to you Alex Daily Double

What force is necessary to accelerate a 1,250 kg car at a rate of 40 m/s/s, using the formula (F=ma)? What is 50,000 N? Back to you Alex

Given the formula (acceleration = final velocity - starting velocity divided by time), what is a plane’s acceleration from Mobile to Saraland if the plane passes over Mobile with a velocity of 8000 m/s north and then passes over Saraland at a velocity of 10,000 m/s north 40 seconds later? {a = (Vf - Vi)/t} What is 50 m/s/s north? Back to you Alex

Two ramps have the same length. One (A) is at 45 degrees. The other (B) is at 30 degrees. Why does ramp B have a better mechanical advantage? What is 30 degrees because its less steep? Back to you Alex

If an athlete runs a 100 m race at a constant speed of 5.0 m/s, how long will it take to run the race? (s = d/t) You have to rearrange to t = d/s What is 20 seconds? Back to you Alex

Why do hydraulic devices use liquids instead of gases? What is gases can be compressed but liquids can’t? Back to you Alex

What is the pressure exerted on the floor by a 3,000 N crate with an area of 2 m 2 ? P = F/A What is 1500 pascals? Back to you Alex

What is the density of a 20 cm 3 sample of liquid with a mass of 25 g (D=M/V)? What is 1.25 g/cm 3 ? Back to you Alex

What does a single pulley change on an object? What is direction only? Back to you Alex

What type of simple machine is a jar lid? What is a screw? Back to you Alex

The 1st stoppered syringe in the picture was pushed in to 1/3 its original volume. What happens to the pressure? What is pressure increases? Back to you Alex

This is the density of a 546 g fish that displaces 420cm 3 of water. (D=M/V) What is 1.3 g/cm 3 ? Back to you Alex

Why does a motor produce less mechanical energy than the energy it uses? What is some energy is converted to sound and heat? Back to you Alex

Levers are divided into classes based on the location of these 3 things. What is the fulcrum, load, and effort? Back to you Alex

If an astronaut throws a ball in space, when will the ball stop? What is never unless it runs into something? Back to you Alex

Which graph best represents the motion of an object whose speed is increasing? What is C? Back to you Alex A.B.C.

Why can you run into a person and knock them over if they are standing still? What is momentum? Back to you Alex

How would you describe the input force and distance of a screw? What is a small input force over a long distance? Back to you Alex

If both a golf ball and a bowling ball are moving at the same velocity, which ball has more momentum? What is the bowling ball because it has more mass? Back to you Alex

A turtle exerts a force of 8 N and has a mass of 2 kg. What’s the turtle’s acceleration? (F=ma) You have to rearrange to a = F/m. What is 4 m/s/s? Back to you Alex

What is a hero’s resultant velocity, if in an action film, he is running forward along the top of a train going 50 m/s, and chasing a villain at a rate of 4 m/s? What is = 54 m/s forward? Back to you Alex

What is the formula for Newton’s 2nd law? What is F = ma? Back to you Alex