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solniwko [45]
3 years ago
7

A 7.9 g bullet leaves the muzzle of a rifle with ayvaci (na25565) – Chapter 4 Basics – balantic – (APPhysPd4Balant) 2 a speed of

443.4 m/s. What constant force is exerted on the bullet while it is traveling down the 0.7 m length of the barrel of the rifle? Answer in units of N.
Physics
1 answer:
MA_775_DIABLO [31]3 years ago
8 0

Answer:

1109.41 N

Explanation:

v_{o} = initial velocity of the bullet = 0 m/s

v_{f} = final velocity of the bullet as it leaves  = 443.4 m/s

a = acceleration of the bullet

d = length of the barrel of the rifle = 0.7 m

the kinematics equation we can use must include the variables in the above list, hence

{v_{f}}^{2} = {v_{o}}^{2} + 2 a d

{443.4}^{2} = {0}^{2} + 2 (0.7)a

a = 140431.11 ms⁻²

m = mass of the bullet = 7.9 g = 0.0079 kg

Force exerted on the bullet is given as

F = ma

F = (0.0079)(140431.11)

F = 1109.41 N

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