You lift a box weighing 30 n a distance of 0.5 m. calculate the work done on the box. 15 j 0 j 0.017 j 60 j

15 J

Explanation:

The work done in lifting the box is equal to the gain in gravitational potential energy of the box, equal to

where

F=30 N is weight of the box

d=0.5 m is the distance through which the box has been lifted

By substituting the numbers into the equation, we find

a. are

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.