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Grade: 11

                        

In the figure the ball s released from rest when the spring is at it`s natural length. For the block B of mass M to leave contact with the ground at some stage, the minimum mass of A must be:

3 years ago

Answers : (1)

Arun
24742 Points
							we know at maximum extension velocity is 0 also extension in spring will be equal to desendent length by block a
so by conservation of energy
kx2 /2 = Mgx
kx = 2Mg
now fbd of a
kx-Mg = Ma
gives a = g
fbd of b with normal force 0 for leaving surface
ma = kx
mg = 2Mg
M = m/2
3 years ago
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