Question

A boy throws a rubber ball vertically upwards. What kind of work is done;
(a) by the force applied by the boy, (b) by the gravitational force. Support your answer with reason.

Answer 1

Answer:

Positive work is done by the force applied by the boy because the ball continue to move in the direction of force. b. Negative work is done by the gravitational force of earth because the ball moves in direction of force i.e opposite to gravitational force. Hope It Helps You!

Answer 2

Positive work is being done by the force applied by the boy and Negative work is done by the gravitational force.

• When a force is applied in an object and the object moves in the direction of the force applied then it is said to be a Positive work.
• When a force is applied in an object but the object moves in the opposite direction of the force applied then it is said to be a Negative work.
• When the kid applies force in the rubber ball it moves upward which is the direction of the force applied, hence a positive work
• When the ball is moving toward but the gravitational force is applying the force in downward direction, hence a negative work