A body of mass 2 ~kg starts from rest and mov | vedclass

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(B) Given: Mass $m = 2 ~kg$,initial velocity $u = 0$,final velocity $v = 20 ~ms^{-1}$ at time $t = 4 ~s$.First,calculate the uniform acceleration $a$

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$100$

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(B) Given: Mass $m = 2 ~kg$,initial velocity $u = 0$,final velocity $v = 20 ~ms^{-1}$ at time $t = 4 ~s$.First,calculate the uniform acceleration $a$ using the equation $v = u + at$:$a = \frac{v - u}{t} = \frac{20 - 0}{4} = 5 ~ms^{-2}$.The force $F$ acting on the body is given by $F = ma = 2 ~kg 	imes 5 ~ms^{-2} = 10 ~N$.Now,find the velocity $v'$ of the body at time $t' = 2 ~s$ using $v' = u + at'$:$v' = 0 + 5 	imes 2 = 10 ~ms^{-1}$.The power $P$ exerted on the body at $t' = 2 ~s$ is given by $P = F 	imes v'$:$P = 10 ~N 	imes 10 ~ms^{-1} = 100 ~W$.

$A$ body of mass $2 ~kg$ starts from rest and moves with uniform acceleration. It acquires a velocity $20 ~ms^{-1}$ in $4 ~s$. The power exerted on the body in $2 ~s$ in watts is

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