At what speed did the shooter, standing on smooth ice, begin to move after a horizontal shot from a rifle?

| August 3, 2021 | education

At what speed did the shooter, standing on smooth ice, begin to move after a horizontal shot from a rifle? The mass of the shooter with the rifle is 70 kg, the mass of the bullet is 10 g, its initial velocity is 700 m / s.

To calculate the speed at which the shooter began to move on smooth ice after the shot, we will use the law of conservation of momentum: mc * Vc = mp * Vp, whence Vc = mp * Vp / mc.

Values of the variables: mp – bullet mass (mp = 10 g = 0.01 kg); Vp – initial bullet velocity (Vp = 700 m / s); mс is the mass of the shooter with the rifle (mс = 70 kg).

Let’s perform the calculation: Vc = mp * Vp / mc = 0.01 * 700/70 = 0.1 m / s.

Answer: The shooter with the rifle after the shot will start moving on smooth ice at a speed of 0.1 m / s.



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