A bullet of mass m = 26 g is fired into a wooden block of mass M = 4.0 kg as sho

Question

A bullet of mass m = 26 g is fired into a wooden block of mass M = 4.0 kg as shown in the figure below. The block is attached to a string of length 1.5 m. The bullet is embedded in the block, causing the block to then swing as shown in the figure. If the block reaches a maximum height of h = 0.26 m, what was the initial speed of the bullet?
m/s

A bullet of mass m = 26 g is fired into a wooden block of mass M = 4.0 kg as shown in the figure below. The block is attached to a string of length 1.5 m. The bullet is embedded in the block, causing the block to then swing as shown in the figure. If the block reaches a maximum height of h = 0.26 m, what was the initial speed of the bullet?

Explanation / Answer

from law of conservatgion of energy....

initial K.E=final P.E...

0.5*m*v^2=(M+m)*g*h.....

v=789.096 m/s

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