Question

Some examples showing that work is done.....
Please answer!!​

Answer 1

Answer:

Example 1

A box is dragged horizontally across a floor by a 100 N force acting parallel to the floor. What is the work done by the force in moving it through a distance of 8 m

F = 100 N

S = 8 m

Since F and S are in the same direction,

θ = 0, where θ is the angle of the force to the direction of movement.

W = F Cos θ

= 100 x 8 x Cos 0

= 800 J (Cos 0 = 1)

Answer 2

Answer:

Examples are

1

A box is pushed along a sliding plane

2

Pulling an object along a horizontal plane