Total momentum remains zero.
Ball momentum = - (machine momentum)
0.068*31.6 = -58 Vmachine
Solve for Vmachine.
The minus sign means that it goes south.
It is called the recoil velocity.
In the real world, friction would keep the ball machine from slipping.
A tennis player places a 58 kg ball machine on a frictionless surface, as shown below. The machine fires a 0.068 kg tennis ball horizontally with a velocity of 31.6 m/s toward the north. What is the final velocity of the machine?
______m/s to the south
2 answers
V=3m/s
1 answer