A body is acted on by a force given by F = (10 + 2t ) N . The impulse received by the body during the first four seconds is :
Given force, F=(10+2t)N Impulse, J=\\int_{0}^{4}F \\cdot dt =\\int_{0}^{4}(10+2t)\\cdot dt=\\left[10t+t^2\\right]^{4}_{0}=\\left[10(4)+4^2\\right]=56Ns .