**Calculate the work done by a car against gravity in moving along a straight horizontal road. The mass of … is 400 kg and the distance…**

###### Answers:

Weight of the car (mg) vertically downward and car is moving along horizontal road, so displacement of the car is in the along horizontal, i.e. angle between them is 90°.

Work done by weight of the car

W = Fs cos 90° = 0 (cos 90° = 0)

Hence, the work done by car against gravity will also be zero.