##### Physics word problem

label Physics
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A 0.226 kg baseball is thrown with a
speed of 10.9 m/s. It is hit straight back at
the pitcher with a ﬁnal speed of 9.65 m/s.
a) What is the magnitude of the impulse delivered to the ball?Answer in units of kg ·m/s.

b) Find the average force exerted by the bat on
the ball if the two are in contact for 0.00161s.

Jun 30th, 2015

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Jun 30th, 2015

A

Final momentum = mass times velocity = 0.226*10.9 =2.4634 kg m/s

Initial momentum = mass times velocity = 0.226 *(-10.9)  = -2.4634 kg m/s

Impulse = change in momentum = final momentum - initial momentum

= 2.4634+2.4634 = 4.9268 kg m /sec

Jun 30th, 2015

Average force = Impulse/ time = 4.9268 / 0.00161 =3060.124 kg m/sec2 or 3060.12 N

Jun 30th, 2015

Jun 30th, 2015
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Jun 30th, 2015
Aug 17th, 2017
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