# Forces acting on a bouncing ball

#1
Am i right in thinking after they ball had bounced and hit the ground and comes back to the maximum bounce height the forces acting boom the ball are balanced and it is gravity and upthrust? As the object is stationary although it is suspended in air?
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1 year ago
#2
(Original post by Strach2k)
Am i right in thinking after they ball had bounced and hit the ground and comes back to the maximum bounce height the forces acting boom the ball are balanced and it is gravity and upthrust? As the object is stationary although it is suspended in air?
No the velocity of the ball is zero but that doesn't mean that the forces are balanced. After the ball bounces the only force acting on the ball is gravity and this will continue to act throughout the motion of the ball. The ball has an upwards velocity but the downwards gravity force causes the velocity to decrease and eventually reach 0.

Any upwards force on the ball will occur at the point that the ball hits the ground, but as soon as it has left the ground that force will no longer be acting.
Last edited by Notnek; 1 year ago
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#3
So at the top of the maximum bounce height after it has hit the ground even though its "suspended in air" still the only force pushing it is gravity, so its unbalanced? If it was horizontal it would be equal forces as its not moving? The fact it has fallen is confusing me?
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#4
So which force is pushing the ball up?
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1 year ago
#5
(Original post by Strach2k)
Am i right in thinking after they ball had bounced and hit the ground and comes back to the maximum bounce height the forces acting boom the ball are balanced and it is gravity and upthrust? As the object is stationary although it is suspended in air?
Have you already studied Conservation of energy? Kinetic energy/gravitational potential energy?
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