Practice Car in Science

Kevin wanted to find out which of his toy cars, the Corvette or the Mustang, would roll downhill faster. He made a ramp by putting several books under one end of a board so that the board was slanted.
Which would be the best way for him to perform his experiment?

• Roll each car down the ramp separately five times and estimate which car looked faster.

• Roll both cars down the ramp together one time and see which one gets to the bottom first.  

• Roll each car down the ramp separately one time, and time them with the second hand on his watch.

• Roll both cars down the ramp together five times and record which gets to the bottom first each time.

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What is the primary force that causes a toy car to roll down a ramp?

• Friction

• Gravity

• Magnetism

• Electricity

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If a toy car is released from the top of a ramp, what type of energy conversion primarily occurs as it moves down?

• Kinetic to potential energy

• Potential to kinetic energy

• Chemical to thermal energy

• Thermal to chemical energy

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Which of the following materials would likely cause the least friction for a toy car rolling down a ramp?

• Sandpaper

• Carpet

• Glass

• Rubber

A toy car is rolling down a ramp. If the height of the ramp is doubled, what happens to the potential energy of the car at the top?

• It remains the same

• It is halved

• It is doubled

• It is quadrupled

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What is the effect of increasing the mass of a toy car on its acceleration down a frictionless ramp?

• Acceleration increases

• Acceleration decreases

• Acceleration remains the same

• Acceleration becomes zero

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Which of the following best describes the motion of a toy car rolling down a ramp with no friction?

• Constant speed

• Constant acceleration

• Constant velocity

• Constant deceleration

If two toy cars of different masses are released from the same height on a ramp, which will reach the bottom first assuming no air resistance?

• The heavier car

• The lighter car

• Both at the same time

• It depends on the shape of the cars

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What is the role of the ramp's angle in determining the speed of a toy car at the bottom?

• A steeper angle increases speed

• A steeper angle decreases speed

• The angle has no effect

• A steeper angle makes the car stop

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Which of the following experiments would best test the effect of surface texture on a toy car's speed?

• Using the same ramp and changing the car's weight

• Using different ramps with the same car

• Using the same ramp and changing the surface material

• Using different cars on the same surface