Impulse vs Work

Practice Problems
Impulse vs Work

Directions: On this worksheet you will examine the properties of force vs time (impulse) and force vs distance (work) as they apply to two objects of different masses.

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Question 1 Two masses, 3 kg and 7 kg, initially at rest, are both pushed by equal forces through the same distance across identical frictionless surfaces. Which mass would experience the greater acceleration?

both masses experience the same acceleration3 kg7 kg

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Question 2 Which mass has the greater final velocity?

3 kgboth masses experience the same increase in velocity7 kg

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Question 3 Which mass gained the greater amount of kinetic energy?

3 kg7 kgboth masses gain the same amount of kinetic energy

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Question 4 Which mass received the greater impulse?

both masses require the same amount of time to reach the end3 kg7 kg

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Question 5 If each mass was pushed by a 33-N force through a distance of 76 meters, what is the ratio of the change in momentum of the 3-kg mass to that of the 7-kg mass?

1.53:11:10.65:10.43:1

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Question 6 What is the final velocity of the 3-kg mass?

26.8 m/sec11.0 m/sec4.7 m/sec40.9 m/sec

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Question 7 How much time was required for the 7-kg mass to travel the entire 76 meters?

5.68 sec2.84 sec3.72 sec1.86 sec

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Question 8 Which formula correctly relates an object's kinetic energy and its momentum?

KE = 2v/p²KE = ½(p²/v)KE = ½(p²/m)KE = 2m/p²

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Question 9 Regardless of which mass is being examined, which graph will always has the greater area?

Force vs Distanceneither is always largerForce vs Timeboth are always equal