# Higher physicsWatch

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Thread starter 2 weeks ago
#1
A small ball of mass 0.2kg is dropped from a height of 4m above the ground. The ball rebounds to a height of 2m.

@ Calculate the speed of the ball just before it hits the ground
B) Calculate the speed of the ball just after it leaves the ground
0
2 weeks ago
#2
(Original post by 6363)
A small ball of mass 0.2kg is dropped from a height of 4m above the ground. The ball rebounds to a height of 2m.

@ Calculate the speed of the ball just before it hits the ground
B) Calculate the speed of the ball just after it leaves the ground
A) loss in g.p.e = gain in k.e
mgh = 1/2mv2
Calculate v

B) gain in g.p.e = loss in k.e
0
X

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