Question

B) A force of 90 N is used to pull a truck 200 m along a horizontal floor. Determine the work done and the increase in K. E if there is no energy loss due to friction. ?

Answer 1

`18\ kJ` & `18\ kJ`

Explanation:

Work done to pull a truck by applying a force of `90 N` through a distance `200\ m` in the same direction

`=\text{force}\times \text{displacement in the direction of force}`

`=90\times 200`

`=18000\ Nm`

`=18\ kJ`

Since, there is no loss of energy due to friction hence the total work done on the truck will be converted into Kinetic energy (K.E.) of truck. Hence change in K.E.

`=\text{work done}=18\ kJ`