A0.145kg baseball traveling at 35 m/s is hit by barry bonds’ bat so that it rebounds in the opposite direction at 40 m/s. determine the ball’s change in momentum (magnitude and direction)

-10.88 kg m/s

Explanation:

The change in momentum of the ball is given by:

where

m is the mass of the ball

u is the initial velocity of the ball

v is the final velocity of the ball

Let's take the initial direction of the ball as positive direction. In this reference frame, we have:

m = 0.145 kg

u = +35 m/s

v = -40 m/s

Therefore, the change in momentum is

And the sign is negative since the change in momentum is in the opposite direction to the initial direction of the ball.

another example of kinetic energy would be,

kinetic energy   >     moving energy

answer   >   letter choice (c),   a hammer falling off a table.

hope that !                                         : )