PPT
Linear Momentum
Name
Period
Date
For each problem,
 read the question carefully, choose the best answer and,
 on multiple choice questions, mark the Scantron sheet (match the question number) or
 fill in the blank(s) or
 follow the instructions for that problem.
 Don’t forget the units in your answers! Show your work for partial credit.
1) If    = /, solve for .
a) (  )/ 
b) ( ) / 
c)  / (  )
d)     
e) (  ) / 
=
2) If ab = cd, solve for c/a.
a) b/d
b) bd
c) db
d) d/b
e) 1
3) How can you increase the linear momentum of something?
a) Increase its mass.
b) Increase its velocity.
c) Apply a net force to it.
d) a & b
e) a, b, & c
4) If a truck has a linear momentum of 10,000 kgm/s, and it is moving at 5 m/s, what is its
mass? Hint: write down the momentum equation and use that to help you figure it out.
This applies to all the calculations you do!
a) 2,000 kgm/s
b) 2,000 N
c) 20,000 N
d) 2,000 kg
e) 50,000 kg
875098249
dk
1
PPT
Linear Momentum
5) If a big truck is driving down the highway and runs into an insect, which of these is true?
a) The truck applies more force to the insect than the insect applies to the truck.
b) The insect's momentum changes more than the truck's.
c) The insect accelerates more than the truck.
d) The insect applies a greater impulse to the truck than the truck applies to the insect.
e) All of the above.
6) Two cars are driving down the street.
The one traveling straight west has a momentum of 10,000 kgm/s.
The one traveling straight east has a momentum of 20,000 kgm/s.
They crash (they always do in physics, you know).
What is the total momentum after the crash?
a) 0 kgm/s
b) 10,000 kgm/s straight east
c) 10,000 kgm/s straight west
d) 30,000 kgm/s straight east
e) 30,000 kgm/s straight west
7) When gymnasts vault over the horse and land, they land on a big pad. How does the pad
help them?
a) The pad reduces the amount of momentum they have when they land.
b) The pad reduces the change of momentum when they land.
c) The pad reduces the total impulse when they land.
d) The pad increases the time it takes to stop, so the force is less when they land.
e) The pad reduces their inertia when they land.
8) A 100 kg man is stuck, motionless, in the middle of a frictionless ice pond. Because it's
cold, he's wearing a coat.
He wants to get off the pond.
Since he has studied physics and knows about conservation of momentum, he decides to
throw his 2 kg coat.
If he throws the coat at 25 m/s, what will his speed be?
a) 0 m/s
b) 0.5 m/s
c) 2 m/s
d) 25.5 m/s
e) 50 m/s
875098249
dk
2
PPT
Linear Momentum
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Total
875098249
dk
Pts
2
2
2
2
2
2
2
2
Answer
Steps
Qual/
quant
math
math
qual
quant
qual
qual
qual
quant
c
a
d
d
c
c
d
b
16
3
Concept
3 variables
proportions
linear momentum
linear momentum
conservation of momentum
conservation of momentum
impulse & momentum
conservation of momentum
PPT
875098249
dk
Linear Momentum
4