Weighing 12481

A stone weighing 200g falls in a free fall for 3 s. Find its kinetic energy on impact.

Correct answer:

E =  90 J

Step-by-step explanation:

m=200 g kg=200:1000  kg=0.2 kg t=3 s g=10 m/s  v=g t=10 3=30 m/s  E=21 m v2=21 51 302=90 J

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