Question

A body of mass 18 kg has a Kinetic energy 144 J. Then velocity is _____ m/s.​

Answer 1

Answer:

t=10sec

10=5×v[P=mv]

v=2m/s

As F=0.2N

a=50.2m/s2=251m/s2[a=mF]

at t=0,KE=21×s×(2)2[KE=21mv2]

KEi=10J

Now, at t=10sec, vf=u+at

vf=g+251×10=2.4m/s2

∴KEf=21×5×(2.4)2

=14.4J

∴△KE=14.4−10

=4.4J

Answer 2

Answer:

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Explanation:

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