Question

During the time a 2.0 kg projectile moves from its initial position to a point that is displaced 20 m horizontally and 15 m above its initial position, how much work in J is done by the gravitational force on the projectile?

Answer 1

Answer:

294J

Explanation:

The work done by gravity is independent of the horizontal distance. It is only dependent on the vertical height of 15m above its initial position.

The work done against gravity is given by

$W=mgh....................(1)$

Given;

m = 2.0kg

$g=9.8m/s^2$

Hence;

$W = 2.0*9.8*15\\W=294J$