Force and Energy 4 DOL

A student wants to see how air resistance affects how long it takes for different shapes of paper to fall. What should they change?

• The color of the paper.

• The shape of the paper.

• The height of the drop.

• The time of day for the experiment.

Students design three different ramps that are at different heights. They release a car down each ramp and record the distance the car travels. What question was this investigation most likely designed to answer?

• How do cars affect ramps?

• How does the height of a ramp affect the distance a car travels?

• How does the type of car affect the distance it travels down a ramp?

• How do different surfaces affect the distance a car travels down a ramp?

Science class is designing an experiment that tests the effect of force on an object. They drop the same ball from different heights and use a meter stick to measure how high the ball bounces. The class repeats the experiment three times and records the results. Why does the science class repeat the experiment three times?

• So they can use a different ball each time

• To increase the reliability of the results

• To formulate a hypothesis

• To demonstrate safe practices in the class.

Which experiment will BEST test how the amount of air in a soccer ball affects how far it rolls when kicked with the same force?

• Kick two different types of balls with the same force from the same starting point.

• Kick the same ball with different amounts of force.

• Kick a ball with different amounts of air from the same starting point with the same force.

• Roll balls with different amounts of air down ramps of different heights.

Shay wants to investigate how the height of a ramp affects how far a toy car rolls after leaving the ramp. What should Shay measure in her experiment?

• The weight of the toy car

• The height of the ramp

• The distance the toy car rolls

• The color of the ramp