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isabel2417
28.12.2020 •
Physics
A rifle with a weight of 40 N fires a 5.5-g bullet with a speed of 220 m/s.(a) Find the recoil speed of the rifle.
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Ответ:
0.2695/s
Explanation:
Using the formula for calculating impulse
Impulse = m(v-u) = Ft
M is the mass
v is the final velocity.
u is the initial velocity
F is the force
t is the time
Get the time;
t = m(v-u)/F
t = 0.0055(220)/40
t = 0.0275s
Get the speed of the rifle
v = u+gt.
v = 0+9.8(0.0275).
v = 0.2695m/s
Hence the speed of the rifle is 0.2695m/s
Ответ:
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