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What is the mass of an object moving at a speed of 9.0 m/s with a kinetic energy of 200 J? Group of answer choices 2.5 kg 4.9 kg 44 kg 1.2 kg 0.81 kg
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What is the mass of an object moving at a speed of 9.0 m/s with a kinetic energy of 200 J?

Group of answer choices

2.5 kg

4.9 kg

44 kg

1.2 kg

0.81 kg

User Mithun Sreedharan
by
8.0k points

1 Answer

0 votes
Ek= 1/2mv²
200=1/2 m(9 ²)
200=1/2(81)m
200=40.5m
m=200/40.5
m=4.93kg

Answer: 4.9 kg (second option)
User Raunaq
by
7.8k points
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