Ele is playing with a ball in a bus that moves in a straight line with constant velocity What can you say about the motion of the body in the moving
bus if Elle throws the ball vertically upwards?

The ball will fall back and land to Elle's hands.

Explanation:

The bus move in a straight line with constant velocity means that there is no change of direction and no acceleration. Inertia can change the direction of the ball and acceleration can change its velocity. Since these two factors is not present in this scenario, the ball only has vertical movement. Thus the ball will land where it was thrown, in Elle's hands.

it becomes positively charged by charging it