Question

1. two round objects are sitting on different shelves. both round objects fall to the floor. which investigation identifies factors that affected the amount of energy transferred during the collisions and will best help determine which object transferred the greatest energy when it hit the floor?

a. weigh each object to determine its mass. the object with the greatest mass will have the greatest kinetic energy released when it hits the floor.
b. take a video of each object as it drops to the floor. the object that falls the quickest will have the greatest kinetic energy released wht it hits the floor.
c. measure the distance each object rolls after it hits the floor. the object that rolls the greatest distance released the greatest energy when it hits the floor.
d. measure the depth of the dent made in a block of clay when each object is dropped onto the clay. the object making the largest dent will release the most energy when it hits the floor.

Explanation:

Kinetic energy is related to the work done. When an object hits the clay, the energy transferred is used to make a dent. A larger dent means more work (energy transfer) has occurred.

• Option A: Mass alone is not sufficient as kinetic energy also depends on velocity.
• Option B: Falling quickly (higher velocity) is part of kinetic energy formula \(KE=\frac{1}{2}mv^{2}\), but we need a way to measure the energy transferred, not just a factor (velocity) in the formula.
• Option C: Rolling distance is affected by factors like friction on the floor, not just the energy from the collision.
• Option D: The depth of the dent in clay is a direct measure of the work (energy transfer) done by the object during the collision.

Answer:

D. Measure the depth of the dent made in a block of clay when each object is dropped onto the clay. The object making the largest dent will release the most energy when it hits the floor.