Question
As a protest against the umpire’s calls, a baseball
pitcher throws a ball straight up into the
air at a speed of 20.4 m/s. In the process, he
moves his hand through a distance of 1.57 m.
The acceleration of gravity is 9.8 m/s
2
.
If the ball has a mass of 0.147 kg, find
the force he exerts on the ball to give it this
upward speed.
Answer in units of N.
pitcher throws a ball straight up into the
air at a speed of 20.4 m/s. In the process, he
moves his hand through a distance of 1.57 m.
The acceleration of gravity is 9.8 m/s
2
.
If the ball has a mass of 0.147 kg, find
the force he exerts on the ball to give it this
upward speed.
Answer in units of N.
Answers
bobpursley
force=g+ a
to find a,
Vf^2=2ad
a=(20.4)^2/(2*1.57)
to find a,
Vf^2=2ad
a=(20.4)^2/(2*1.57)