Linear Momentum
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Photo Credit: Sparknotes Photo Credit: Sparknotes
Linear momentum can be found by using the simple equation: momentum = mass * velocity. Momentum is a force of mass moving in one direction, so Newton's Second Law of Motion (force = mass * acceleration) is often used in correlation with momentum when the mass of the system is constant; F=Δp/Δt => Δp=Δ(mv) => a = Δv/Δt => F=ma.
Newton's Third Law of Motion
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Photo Credit: Idle Analytics Photo Credit: Colorado State
Newton's Third Law of Motion states for every action, there is an equal and opposite reaction. For example, from the left photo above, the two balls each have the same amount of mass. The 13 ball picks up velocity and heads straight for the stationary 8 ball. When the balls collide, the force is transferred from the 13 ball to the 8 ball and the 8 ball begins to acceleration. The 8 ball, however, does exert a force on the 13 ball which causes the 13 ball to slow down and finally come to stop.
Newton's Third Law of Motion is also proven true in the right photo above. If for some reason a straight shot from the cue ball into another ball is not possible, the cue ball is shot into the wall making it bank into the intended direction; the shot is commonly known as the bank shot. The ball is able to bounce off the wall because the table is stable to the ground, and the mass is larger than the ball. The direction the ball will bank depends on the angle the ball was hit toward the wall.
Newton's Third Law of Motion is also proven true in the right photo above. If for some reason a straight shot from the cue ball into another ball is not possible, the cue ball is shot into the wall making it bank into the intended direction; the shot is commonly known as the bank shot. The ball is able to bounce off the wall because the table is stable to the ground, and the mass is larger than the ball. The direction the ball will bank depends on the angle the ball was hit toward the wall.