Question

George pushes a wheelbarrow for a distance of 12 meters at a constant speed for 35 seconds by applying a force of 20 newtons. What is the power applied to push this wheelbarrow?

Answer 1

Answer: 6.86 watt

Step-by-step explanation: Power is the rate of doing work.

`Power=(work)/(time)`

A force is said to have done a work if it results in the displacement of an object in the direction of the force applied.

`Work=Force* displacement=20N* 12m=240Nm=240J`

(1Nm=1Joule)

Thus
`Power=(240Nm)/(35sec)=6.86Nms^(-1)= 6.86watt`

`(1Nms^(-1)=1Watt)`

Answer 2

Since Power is equal to the product of Force and Displacement all over time, George needs 6.86 W of power to push the wheelbarrow. Power can also be calculated by multiplying Force applied on the object and the speed of the object being applied of the force.