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BabaBlast [244]
3 years ago
12

A rock hits the ground with a speed of 7 m/s and a kinetic energy of 100 J. What is the rock's mass?

Physics
2 answers:
ad-work [718]3 years ago
8 0
Mass = (2*KE) / v²
∴ the answer is 200/49 
Sloan [31]3 years ago
8 0
KE=1/2 times mass times velocity squared. So in this situation your equation would look like this 100J=1/2 times mass times 7 m/s^2. Your answer would be 4.0812 kg
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