The work done by a force F → = - 5 x 4 i ^ N in displacing a body from x = 2 m to x = - 2 m is

Step-by-step solution

Work done d W = F . → d r → ⇒ d W = - 5 x 4   i ^ . d x   i ^ ⇒     d W = - 5 x 4 d x ⇒     W = ∫ d W = ∫ 2 - 2 - 5 x 4 d x ⇒     W = - x 5 2 - 2 = 64   J