Question

2. A bullet of mass 10gm, moving horizontally, strikes and embedded itself in a box of mass 1kg suspended from a light string shown in the figure below. If the composite mass rises to a height, H = 0.45m, then what is the speed of the bullet before collision? H-GAS H = 0.45 kg Kg d. 90m/s а. 303m/s b. 300m/s c. 90.0m/s

Answer 1

Velocity of block = 2gh−−−√=2×g×0.1−−−−−−−−−√=2–√m/s

Pi=Pf

(10×10−3)×400+0=2×2–√+(10×10−3)V

V=(4−22√)10×10−3=120m/s

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