Question

A ball of mass m = 2 kg is held in your hand and you throw it upwards. It is in contact with your hand for 0.4 seconds. It takes 4 more seconds to go up and come back down and you catch it when it comes back to the same point. The time it takes you to catch the ball' is 0.05 seconds. Assume all forces are constant during the time they act. Answer the following questions with magnitude and direction. (Take g= 10 m/s2)
1. What is the gravitational force on the ball after it leaves your hand and moves upwards?
2. What is the gravitational force on the ball on its way downwards?
3. What is the gravitational force on the ball at the topmost point when it stops? 4. What is the net force on the ball when it reaches its topmost point?
5. What is the gravitational force on the ball when it strikes your hand?
6. What is the net force on the ball when it strikes your hand and is getting stopped?
7. What is the gravitational force during the time the ball is being thrown up from your hand?
8. What is the normal force exerted by your hand on the ball when the ball is being thrown up?
9. What is the normal force exerted by your hand on the ball after the ball is thrown up?
10. What is the normal force exerted by your hand on the ball when the ball is being caught on its way back?
11. What is the average normal force exerted by your hand for the entire period from the time at rest before you thrown it up to the time the ball caught and comes to rest?​

Answer 1

Answer:

1. gravitational force is always mg i.e. 2×10= 20 N