Question

a person of mass 40 kg is running with velocity 2m s changes to 6m/s in time interval 60 s . find final kinetic energy

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Answer 1

Answer:

Kinetic energy = 1/2 M(V) ^2

therefore, 1/2 *40*(6-2)^2

320 joules.

Answer 2

Answer:

k= 720 joules

Explanation:

final kinetic energy ,

$k = \frac{1}{2} m {v}^{2}$

final velocity = 6 m/ s

$k = \frac{1}{2} \times 40 \times {6}^{2}$

$k = 20 \times 36$

$k= 720 \: joules$

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