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, 3 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?
3 kg
8 kg
both masses experience the same acceleration
omit
Question 2
Which mass has the greater final velocity?
3 kg
8 kg
both masses experience the same increase in velocity
omit
Question 3
Which mass gained the greater amount of kinetic energy?
both masses gain the same amount of kinetic energy
8 kg
3 kg
omit
Question 4
Which mass received the greater impulse?
both masses require the same amount of time to reach the end
8 kg
3 kg
omit
Question 5
If each mass was pushed by a 36-N force through a distance of 62 meters, what is the ratio of the change in momentum of the 3-kg mass to that of the 8-kg mass?
1.63:1
0.38:1
1:1
0.61:1
omit
Question 6
What is the final velocity of the 3-kg mass?
23.6 m/sec
4.5 m/sec
38.6 m/sec
12.0 m/sec
omit
Question 7
How much time was required for the 8-kg mass to travel the entire 62 meters?
5.25 sec
2.62 sec
3.21 sec
1.61 sec
omit
Question 8
Which formula correctly relates an object's kinetic energy and its momentum?
KE = 2m/p
2
KE = ½(p
2
/m)
KE = 2v/p
2
KE = ½(p
2
/v)
omit
Question 9
Regardless of which mass is being examined, which graph will always has the greater area?
neither is always larger
Force vs Distance
Force vs Time
both are always equal
PhysicsLAB
Copyright © 1997-2018
Catharine H. Colwell
All rights reserved.
Application Programmer
Mark Acton