NEW
Font size
S
M
L
XL
Worksheetsmomentum and impulse
Total questions: 20
Worksheet time: 24mins
Name
Class
Date
1.
A 5 N force is applied to a 3 kg ball to change its velocity from +9 m/s to +3 m/s. The impulse on the ball is ______ N s.
a)
-2.5
b)
-10
c)
-18
d)
-45
2.
A 0.250 kg cart moving at 0.400 m/s has how much momentum?
a)
0.1 kg-m/s
b)
1 kg-m/s
c)
10 kg-m/s
d)
100 kg-m/s
3.
Softer landings tend to
a)
increase impact force
b)
increase force
c)
increase collision time
d)
increase change in momentum
4.
The difference between a car hitting a wall vs. a car hitting a hay stack is
a)
the Impulse on the car hitting the wall is greater
b)
the change in momentum of the car hitting the wall is greater
c)
the force on the car hitting the hay stack is greater
d)
the collision time of the car hitting the hay stack is greater
5.
A runner has a momentum of 670 kg m/s and is travelling at a velocity of 9 m/s. What is his mass?
a)
6030 kg
b)
0.0134 kg
c)
74.4 kg
d)
80 kg
6.
The units for Impulse are
a)
N/s
b)
N.s
c)
N
d)
m/s
7.
Cart A is pulled with a 2 Newton force for 2 seconds, and Cart B is pulled with a 1 Newton force for 3 seconds. Which cart experiences the greatest impulse?
a)
Cart B
b)
Cart A
c)
they are the same
8.
A boy kicks a football with a force of 20 N, the time the force acts for is 0.3 s.
Calculate the impulse on the ball.
Calculate the impulse on the ball.
a)
1 N.s
b)
6 N.s
c)
66 N.s
d)
None of these
9.
The purpose of crumble zones on a car is to
a)
decrease time of impact.
b)
increase force of impact.
c)
increase the time of impact.
d)
decrease the impulse during impact.
10.
In an isolated system, the net ____ on that system is zero.
a)
external force
b)
internal force
c)
time interval
d)
displacement
11.
The impulse-momentum theorem states that
a)
the impulse on an object is equal to the change in momentum it causes
b)
the force on a moving object is equal to the magnitude of the impulse.
c)
the impulse on an object is greater than the change in momentum it causes
d)
the impulse on an object is less than the change in momentum it causes
12.
A constant force of 4.5 N acts on a 7.2-kg object for 10.0 s. What is the change in the object's velocity?
a)
6.3 m/s
b)
3.2 m/s
c)
1.2 m/s
d)
4.33 m/s
13.
If an air bag changes a 60 kg person's speed from 40.0 m/s to 0.0 m/s, what impulse must act on the person?
a)
2400 kg.m/s
b)
1.5 kg.m/s
c)
0.67 kg.m/s
d)
1500 kg.m/s
14.
The velocity of a 975-kg car is changed from 12.0 m/s to 27.0 m/s in 15s by an external, constant force. What is the magnitude of the force?
a)
9.75×102 N
b)
1.46×104 N
c)
9.75×103 N
d)
975 kg·m/s
15.
A force acted upon an object for 3 s as shown in the graph below.
What is the magnitude of the impulse on the object?
What is the magnitude of the impulse on the object?
a)
3
b)
4.5
c)
6
d)
9
16.
what is the objects momentum for 8 m/s
a)
6
b)
8
c)
10
d)
12
17.
what is the object's velocity for momentum of 6 kg.m/s?
a)
2
b)
4
c)
6
d)
8
18.
can a bullet have the same momentum as a truck?
a)
yes
b)
no
19.
What is the object's mass?
a)
1 kg
b)
2 kg
c)
1.5 kg
d)
2.5 kg
20.
Which takes more force to catch, a bowling ball or a ping pong ball?
a)
bowling ball because it has more momentum
b)
ping pong ball because it has more momentum
c)
both require the same amount of force when catching
d)
bowling ball because it has less momentum
Reset
