Physics, asked by manuelalias8169, 10 months ago

A disc of mass is kept floating in air with the help of bullets fired with the same velocity at the rate of bullets per second. Mass of each bullet is of the disc. If the bullets rebound with same speed in opposite direction after striking the disc, then the velocity of bullet at the time of impact is:

Answers

Answered by morekiranm77
0

Answer:

Suppose speed of firing is V then after

rebounding the momentum frees fessed

to the dis will be charge in momentum

ΔP=−mv−(mv)=−2mv

initial

Value =∣ΔP∣=2mv

⇒ Fr 10 bullets 10×2=20mv

m=0.05kg⇒∣ΔP∣total=v

time Δt=1 second

⇒ Fore entered =Δt∣ΔP∣total=1v=v Newton

it should balance the eight of disc

to prevent it from falling 

So =Mg=1×9.8

⇒v=9.8mls 

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