An object having mass = 2kg experience a force in x - direction. Find work done by force in first 3 sec.
Given, m = 2 kg
F = 2t^2 i
a = F/m = 2t^2/2 = t^2 i
Assuming initial velocity was zero, u = 0
We know that, dw = F.dx
Put t = 3 secs
W = 81 J