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1. the conservation of momentum when the bullet hits the pendulum is calculated.
Time of fall through a height of 0.06m can be found from the formula
h = ut + 0.5 gt^2 [u (initial velocity of bob)= 0], t = sqrt(2gh)
thus t= sqrt(2*9.8*0.06) = 1.0844 seconds
2. conservation of energy when the bullet+pendulum swing to the top is then calculated.
V = h/t = d/sqrt(2gh
Initial velocity, to cause combined velocity V of mass M+m would be;
v = (M+m)V / m = (M+m) h / m sqrt(2gh)
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