Question

In which of the following cases work done be maximum when the body is moved through a distance 'S'
on the ground
[ ]
F
F
F
300
60°
450
F
P)
R)
)
b) R
S)

a) P
c) Q
d) s​

Answer 1

Answer:

work done is given by F.S

Dot product of force and displacement. Both force and displacement are vector component and their dot product is scaler quantity and given by ∣F

→

∣.∣S

→

∣Cosθ. Where θ is angle between the force and displacement.

as the body is moved along ground with same magnitude of displacement and force and then force having least angle with horizontal will be highest work, as Cosθ is maximum as θ goes towards zero.

so best answer is option D.