CCA Force and Motion Review

Which of the following best describes theenergy transformations that occur when a flashlight that runs on batteries is turned on

• Chemical => light => electrical
• Electrical => light => chemical
• Light > electrical > chemical
• Chemical > electrical > light

Which object changes electrical energy into mechanical energy

• a
• b
• c
• d

Which is an example of conduction?

• Solar energy warming a room
• Heat rising from the coils of a stove
• Hot air drying a wet towel
• heat moving from a clothing iron to a shirt

There are four object. A liquid is poured into each. The starting temperature and ending temperature are recorded. Which is the best at insulating the material in the cup?

• Start temp 30 Final temp 29
• Starting temp 30 final 14
• starting temp 30 ending temp 21
• Starting temp 30 final temp 9

Which pulley gives a mechanical advantage.

• a
• b

Four drivers took cars out for test drives on an open stretch of road. A graph of the distances and times is shown below. Use the graph to calculate the average speed of Driver 4. Round your answer to the nearest tenth of a meter per second. 

• 7 meters per second
• 7.10 meters per second
• 7.5 meters per second
• 7.2 meters per second

A mechanical advantage is gained when using some simple machines. For example, an inclined plane can be used to raise an object that is too heavy to lift without a machine. Which inclined plane described in the cart would have the greatest mechanical advantage? 

• Inclined plane 1
• Inclined plane 2
• Inclined plane 3
• Inclined plane 4

A box and forces are shown. 
A box rests motionless on the ground. One student is pushing the box to the right with a force of 2 Newtons. The other student is pushing to the left with a force of 5 Newtons. In which direction and with what type of speed will the box move?

• It will move left at a constant speed
• It will move left at an increasing speed
• It will move right at a constant speed
• It will move right at an increasing speed

The graph shows the speed of a car traveling east over a 12 second period. Based on the information in the graph, it can be concluded that in the first 6 seconds, the car is –

• changing its direction.
• experiencing less and less friction.
• accelerating at a constant rate.
• climbing a steep incline.

What is the difference in average speed between two cars, one that traveled 160 kilometers in 5 hours, and the other that traveled 140 kilometers in the same time?

• 32 km/hr
• 6 km/hr
• 4 km/hr
• 28 km/hr