AnswersPhysics IImpulse and Momentum

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1
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What are possible units for impulse? Choose two correct answers.

A
cap n times m
B
kg times m over s
C
the fraction with numerator cap n times m and denominator s
D
kg times m
E
cap n times s
3

A 0 point 2 5 kilograms baseball is in contact with a bat for 0 point 0 0 7 5 s and exerts a force of 18 comma 500 cap n What impulse is delivered to the ball?

A
4600 kilograms times m over s
B
74 comma 000 kilograms times m over s
C
140 kilograms times m over s
D
33 kilograms times m over s
4

What is the SI unit for momentum?

A
kg times the fraction with numerator m and denominator s squared
B
kg times m over s
C
kg times m
D
kg times the fraction with numerator m squared and denominator s
6

What best describes an impulse acting on an object?

A
the velocity of an object divided by its mass
B
the product of an object's mass and the time of force impact
C
the net force on an object divided by the time of impact
D
the product of an object's mass and its change in velocity
7

Students perform an experiment in which they drop two eggs with equal mass from a balcony. In the first trial, the egg hits the ground and breaks. In the second trial, the egg hits a foam cushion and does not break or bounce. What conclusions about impulse can the students make?

A
The impulse cannot be determined without the mass and velocity of the eggs.
B
The impulse was greater in the first experiment because the egg broke.
C
The impulse was greater in the second experiment because the egg did not break.
D
The impulse was the same in both experiments because the egg came to a stop.
9

What are possible formulas for impulse? Choose three correct answers.

A
cap j is equal to m triangle v
B
cap j is equal to cap f over triangle t
C
cap j is equal to m over triangle t
D
cap j is equal to cap f triangle v
E
cap j is equal to triangle p
F
cap j is equal to cap f triangle t

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