Answer:

Here is the answer to A block mass Nt is kept on a platfon which is acelerated

upwand with a constant acceleration 'a' during the time

interval T. The wurk done by normal reaction lxctween the

black and platform is

Answer:

1/2[M(g+a) aT^2]

Explanation:

W=N*S

S=ut+1/2at^2

S=1/2(aT^2) [initial velocity is zero]

N=M(g+a)

So now,

W=M(g+a) *1/2(aT^2)

Hope it helps