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.
omit
Question 1
Two masses, 2 kg and 8 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?
2 kg
both masses experience the same acceleration
8 kg
omit
Question 2
Which mass has the greater final velocity?
both masses experience the same increase in velocity
8 kg
2 kg
omit
Question 3
Which mass gained the greater amount of kinetic energy?
both masses gain the same amount of kinetic energy
2 kg
8 kg
omit
Question 4
Which mass received the greater impulse?
2 kg
8 kg
both masses require the same amount of time to reach the end
omit
Question 5
If each mass was pushed by a 38-N force through a distance of 65 meters, what is the ratio of the change in momentum of the 2-kg mass to that of the 8-kg mass?
2.00:1
1:1
0.25:1
0.50:1
omit
Question 6
What is the final velocity of the 2-kg mass?
4.8 m/sec
49.7 m/sec
19.0 m/sec
24.8 m/sec
omit
Question 7
How much time was required for the 8-kg mass to travel the entire 65 meters?
5.23 sec
1.31 sec
2.62 sec
2.62 sec
omit
Question 8
Which formula correctly relates an object's kinetic energy and its momentum?
KE = ½(p
2
/v)
KE = 2v/p
2
KE = ½(p
2
/m)
KE = 2m/p
2
omit
Question 9
Regardless of which mass is being examined, which graph will always has the greater area?
neither is always larger
both are always equal
Force vs Time
Force vs Distance
PhysicsLAB
Copyright © 1997-2021
Catharine H. Colwell
All rights reserved.
Application Programmer
Mark Acton