You throw a ball upward and let it fall to the ground. Your friend drops an iden

Question

You throw a ball upward and let it fall to the ground. Your friend drops an identical ball straight down to the ground from the same height.

Part A

Is the change in kinetic energy of your ball greater than, less than, or equal to the change in kinetic energy of your friend's ball?

A) Greater than the change in kinetic energy of your friends ball

B) Less than the change in kinetic energy of your friends ball

C) Equal to the change in kinetic energy of your friends ball

(The answer C is Correct)

Part B

Choose the best explanation from among the following:

A) Your friend's ball converts all its initial energy into kinetic energy.

B) Your ball is in the air longer, which results in a greater change in kinetic energy.

C) The change in gravitational potential energy is the same for each ball, which means the change in kinetic energy must be the same also.

What is the answer to Part B?

Explanation / Answer

The answer to part B is option C.

this is because in part A, we have got that change in kinetic energy in both cases is same. As the total energy is conserved, so chage in kinetic energy=change in potential energy ( ignoring presence of all other forms of energy). In the both cases the initial height from which ball is thrown same and the final destination is also the same. so change in potential energy is same in both cases. so option C is the correct answer.

all the best in the course work

Related Questions

Navigate

• Browse (All)
• Browse Y
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.