A bullet of mass 10 g moving horizontally with a velocity of 400 ms–1 strikes of wooden block of mass 2 kg which is suspended by a light inextensible string of length 5 m. As a result the centre of gravity of the block is found to rise a vertical distance of 10 cm. The speed of the bullet after it emerges out horizontally from the block will be
During the collision, apply moementum conservation (0.01)(400) + 0 = (2)V + (0.01)V'
where V = √2gh
V = √2 ×10× 0.1
V = √2 solving
V' = 120 m/sec. Ans.
A rigid ball of mass m strikes a rigid wall at 60º and gets reflected without loss of speed as shown in the figure below. The value of impulse imparted by the wall in the ball will be
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What is the output Y in the following circuit, when all the three inputs A, B, C are first 0 and then 1 ?
