Question

A FORCE f=(2î-6j)N is applied on a body which is sliding over the floor.if the body is displaced through (-3j)m.how much work is done by a force?

Answer 1

Answer:

Work done W = F.S = (2i-6j).(-3j) = 0 + 18 = 18J

Work done = 18J

Answer 2

Answer:

given, F=(2j-6j)N

it means F=(-4j)N

displacement=(-3)m

now,we know that W=F×s

W=(-4×-3)j

W=12j