Question

${\tt{\red{\underline{\underline{\huge{QuesTion}}}}}}$
A body starts with rest and accelerates with an uniform acceleration 5m/sec2 for 4 seconds. Mass of the body is 1kg. Find its kinetic energy in this 4 second.
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Answer 1

Answer:

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• V=u+at

•V=o+5×4

•V=20 m/s.

Given: Mass -1 kg

2).Acceleration :5m/s^2 & u =0m/s V=?

• Kinetic energy : 1/2 ×mass ×(velocity)^2

• Ke:-1/2×1 ×(20)^2

• Ke:-200 joules