---
title: "A kickball is rolled by the pitcher at a speed of 10 m/s and it is kicked by another student. The kickball deforms a little during the kick, and then rebounds with a velocity of 15 m/s as its shape restores to a perfect sphere. Select all that must be true about the kickball and the kicking foot system. "
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url: "https://nerd-notes.com/ubq/24741/"
date_modified: "2024-02-13T03:15:34+00:00"
---

# A kickball is rolled by the pitcher at a speed of 10 m/s and it is kicked by another student. The kickball deforms a little during the kick, and then rebounds with a velocity of 15 m/s as its shape restores to a perfect sphere. Select all that must be true about the kickball and the kicking foot system. 

A kickball is rolled by the pitcher at a speed of 10 m/s and it is kicked by another student. The kickball deforms a little during the kick, and then rebounds with a velocity of 15 m/s as its shape restores to a perfect sphere. Select all that must be true about the kickball and the kicking foot system.

- **A.** The kinetic energy of the system before and after the kick is the same.
- **B.** The kinetic energy of the system before and after the kick is not the same.
- **C.** The momentum of the system before and after the kick is the same.
- **D.** The momentum of the system before and after the kick is not the same.
- **E.** Compared to kicking foot, the ball had the greater change in momentum.

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/24741/*