Question

A force of 12N acts on an object of mass of 4kg in the state of rest for 3s calculate the kinetic energy acquired by the object​

Answer 1

Answer:

Force = mass × acceleration

F=12N

m=4kg

then,

a= m/F

a=4/12

a=3m/s

(i) Now,

u=0

t=3sec

v=u+at=0+3×5=15m/s

(ii)Initial momentum=mu=2×0=0

Final momentum=mv=2×15=30kg−m/s

Change in momentum=Final momentum - Initial momentum

=30−0=30kg−m/s

Answer 2

Answer:

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Explanation:

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