Question

A speed of a body of mass 40g having kinetic energy 200j is

Answer 1

Explanation:

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Answer 2

Explanation:

Given kinetic energy=200j

Mass=40kg

Kinetic energy=1/2×mass×velocity

200j=1/2×4×10

10²=10-²×v²

v²=10⁴

v²=(10²)²

square root both side

v=100ms(answer)