A bullet of mass m = 26 g is fired into a wooden block of mass M = 4.4 kg as sho
ID: 2192189 • Letter: A
Question
A bullet of mass m = 26 g is fired into a wooden block of mass M = 4.4 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 = 0.25 m, what was the initial speed of the bullet? in M/s
A bullet of mass m = 26 g is fired into a wooden block of mass M = 4.4 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 = 0.25 m, what was the initial speed of the bullet? in M/sExplanation / Answer
Loss in Kinetic Energy = Gain in Potential Energy
Let the Initial Velocity of Bullet = V m/sec
0.5*m*V^2 = (M+m)gh
0.5*26*10^-3*V^2 = (4.4 + 26*10^-3)*9.8*0.25
V = 28.88 m/sec
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