Question
Asked Oct 25, 2019

What has more kinetic energy: a 500g cream pie flying at 15m/s or a 5kg bowling ball traveling at 5m/s?

check_circleExpert Solution
Step 1

Given information:

1 kg
1000 g
m500 g
0.5 kg
m 5 kg
=15 m/s
bb
-5 m/s
Vbb
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1 kg 1000 g m500 g 0.5 kg m 5 kg =15 m/s bb -5 m/s Vbb

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Step 2

Here, mcp and mbb are the mass of cream pie and bowling ball respectively and vcp and vbb­ are the velocities of the cream pie and bowling ball respectively.

Write the expression for the kinetic energy and plug the required values to find the kinetic energy of cream pie, Kcp.

1
Кра
-т,
ср" ср
2
ср
1
(0.5 kg)(15 m/s)
2
=56.25 J
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1 Кра -т, ср" ср 2 ср 1 (0.5 kg)(15 m/s) 2 =56.25 J

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Step 3

Write the formula for the kinetic energy and plug the required values to fi...

1
Крь
m
тъьУьь
bb
bb
2
1
(5 kg)(5 m/s)
2
- 62.5 J
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1 Крь m тъьУьь bb bb 2 1 (5 kg)(5 m/s) 2 - 62.5 J

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