10. A person is about to kick a soccer ball. Consider the leg and foot to be a single rigid body and that it rotates about a fix
1 answer:
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Answer:
The momentum is 1.94 kg m/s.
Explanation:
To solve this problem we equate the potential energy of the spring with the kinetic energy of the ball.
The potential energy of the compressed spring is given by
,
where is the length of compression and
is the spring constant.
And the kinetic energy of the ball is
When the spring is released all of the potential energy of the spring goes into the kinetic energy of the ball; therefore,
solving for we get:
And since momentum of the ball is ,
Putting in numbers we get:
Answer:
W = -148.8 kJ/s
Qc= -101.2 kJ/s
Explanation:
<u>note: </u>
<u> Solution is attached in word form due to error in mathematical equation. please find the attachment </u>
