Momentum Worksheet
brooks wilson
Name__________________________
Date _____________
Period ____
True or False?
true
_______1.)
Momentum is not equal to the mass of an object divided by its velocity.
true
_______2.)
The momentum of an object can change.
false
_______3.)
Two objects with the same mass will always have the same momentum.
true
_______4.) All moving objects don’t have momentum.
true
_______5.)
When an object speeds up, it gains momentum.
false
_______6.)
Objects with different masses can’t have the same momentum.
false
_______7.)
Direction does not matter when you are measuring momentum.
true
_______8.)
Momentum can be transferred from one object to another.
false
_______9.)
When objects collide, some momentum is lost.
true
_______10.)
A tiny bullet can have more momentum than a huge truck.
Fill in the blank.
twice
11.) A moving car has momentum. If it moves twice as fast, its momentum is ________________
as much.
12.) Two cars, one twice as heavy as the other, move down a hill at the same speed. Compared to the lighter
twice
car, the momentum of the heavier car is ___________________
as much.
Given the following data, solve for momentum. P = mv
Object
Mass (kg)
Velocity (m/s)
13.) Bird
.04
19
14.) Football player
100
Momentum (kg-m/s)
.76
10
1,000
15.) Skier
60
20
1,200
16.) Bullet
.004
600
17.) Frog
.9
12
18.) Meteorite
.1
1,000
19.) Baseball
.14
30
2.4
10.8
100
4.2
20.) Wagon
2
3
21.) Satellite
3,000
8,000
6
24,000,000
Equation
Gives you…
Momentum
If you know…
Mass and Speed
Mass
Momentum and Speed
Speed
Momentum and Mass
22.) A steel ball whose mass is 2.0 kg is rolling at a rate of 2.8 m/s. What is its momentum?
Looking for
Solution
the momentum
Given
P=m*v m= 2.0kg v= 2.8m/s
Relationships
there is none
23.) A marble is rolling at a velocity of 1.5 m/s with a momentum of 0.10 kgm/s. What is its mass?
Looking for
Given
Relationships
Solution
24.) On April 15, 1912, the luxury cruise liner Titanic sank after running into an iceberg. What was the cruise
liner’s speed when it collided with the ice berg if it had a mass of 4.23 x 108 kg ship and a momentum of 4.9 x
109 kg·m/s?
Looking for
Solution
Given
Relationships
25.) Suppose you are traveling in a bus at highway speed on a nice summer day and the momentum of an
unlucky bug is suddenly changed as it splatters onto the front window.
a) Compared to the force that acts on the bug, how much force acts on the bus. (more) (the same) (less)
b) Although the momentum of the bus is very large compared to the momentum of the bug, the change
in momentum of the bus compared to the change in momentum of the bug is (more) (the same) (less)
c) Which experiences the greater acceleration (HINT: think of Newton’s 2nd Law)?
(bus) (both the same) (bug)
d) Which, therefore, suffers the greater damage? (bus) (both the same) (the bug of course!)
Name ________________________________________ Date __________ Period ________
Worksheet: Conservation of Momentum
CHAPTER 8:
Momentum
Directions: Answer the following questions concerning the conservation of momentum using the
equations below. Show all of you work to receive credit.
p = mv
pbefore = pafter
Ft = ∆ (mv )
impulse = F∆t
net momentum before = net momentum after
( m1v1 + m2 v2 ) before = ( m1v1 + m2 v2 ) after
1. When these two freight cars of different mass collide and couple, what will be their resultant
velocity?
2. A 2 kg blob of putty moving at 4 m/s slams into a 6 kg blob of putty at rest. What is the speed
of the two stuck-together blobs immediately after colliding?
3. A football player runs at 8 m/s and plows into a 80 kg referee standing on the field causing
the referee to fly forward at 5.0 m/s. If this were a perfectly elastic collision, what would the
mass of football player be?
4. Assuming that this is a perfect inelastic
collision, calculate the velocity after the
collision in the example below.
5. A large locomotive with a mass 4 times
that of the smaller motionless railroad car collides and couples together. What is their combined
speed after the collision?
6. A 2.0 kg mass is moving on a frictionless airtrack. It collides into a motionless 1.5 kg mass.
What is the the combined speed of the two masses if they stick together on impact?
7. A 1000 kg car is rolling down the street at 2.5 m/s. How fast would a 2500 kg car have to
collide into it in order to bring it to rest (0 m/s)?
8. A railroad car slams into another railroad car
and couples together. What is the combined
speed of the railroad cars after the collision?
9. Two blocks moving in opposite directions
collide and stick together after the collision.
What is their combined speed after the collision?
10. An explosion causes the cars to move apart from each other. According to the diagram
below, what is the speed of each of the cars as they move away from each other?
11. A 3000-kg truck moving rightward with a speed of 5 km/hr collides head-on with a 1000-kg
car moving leftward with a speed of 10 km/hr. The two vehicles stick together and move with the
same velocity after the collision. Determine the post-collision speed of the car and truck.
12. During a goal-line stand, a 75-kg fullback moving
eastward with a speed of 10 m/s collides head-on with a
100-kg lineman moving westward with a speed of 4 m/s.
The two players collide and stick together, moving at the
same velocity after the collision. Determine the the postcollision velocity of the two players.
13. Calculate the velocity of the rifles recoil after firing.
14. What is the velocity of the "8" ball after the elastic collision below?
15. A 6000 kg railroad car moving at 5 m/s
collides into a stationary car with a mass of 4000
kg. If they couple together after the collision,
what will be their combined velocity immediately
after impact?