Download Worksheet 9 - Impulse

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Impulse = J =
Name: ____________________________
Period: _______
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Example A: A billiard ball of mass 0.17 kg strikes the side of the pool table with speed 1.1 m/s
and rebounds in the opposite direction with a speed of 0.9 m/s. What was the impulse exerted
by the ball on the side of the pool table?
FORMULA:
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ANSWER:
Example B: A golfer swings a golf club, hitting a 46-gram golf ball with a force of 100 N, and
maintaining contact with the ball for 0.90 seconds. What impulse was imparted to the ball?
FORMULA:
1.
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ANSWER:
A football player kicks a ball with a force of 50 N. Find the impulse on the ball if his foot
stays in contact with the football for 0.01 s.
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3.
ANSWER:
What is the impulse of a 3 kg object accelerating from rest to 12 m/s?
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2.
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A space shuttle with mass of 7.0 x 10 5 kg begins its orbit with 13,000 kg of fuel and is
travelling at 50.0 m/s. Because it is burning fuel, its mass decreases even if it maintains a
constant speed. Find its change in momentum if it is still travelling at 50.0 m/s, but now
only has 7,000 kg of fuel.
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Name: ____________________________
Period: _______
4.
Aunt Mary needs to hang a picture in her bedroom. She uses a hammer to drive the nail
into the wall. Find the force exerted by the hammer on the nail if the hammer stays in
contact with the nail for 0.5 s and has an impulse of 25 Ns.
FORMULA:
5.
ANSWER:
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A hockey player applies an average force of 80 N to a 0.9-kg hockey puck for a time of 0.2
s. Determine the impulse experienced by the hockey puck.
FORMULA:
8.
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A pitcher throws a baseball (m = 145 g) at 38.0 m/s toward the catcher. The batter bunts
the baseball, sending it straight back toward the pitcher at 38 m/s. What is the change in
momentum of the baseball?
FORMULA:
7.
ANSWER:
A van of mass 1200-kg was moving at a velocity of 8 m/s when it was involved in a head
on collision with a semi tractor-trailer moving in the opposite direction. Assuming that the
van came to stop after the collision, calculate its change in momentum.
FORMULA:
6.
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A tennis player, remembering her coach’s emphasis on “follow-through,” kept her racket in
contact with the tennis ball for 0.75 s to achieve an impulse of 74 Ns. What was the
average force exerted by the racket on the ball?
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