WorksheetsA.P. Physics Impulse
Total questions: 46
Worksheet time: 2hrs 42mins
Name
Class
Date
1.
To what height does the steel ball rise after the collision in the picture?
a)
1.8 m
b)
19 degrees
c)
19 cm
d)
.29 m
2.
The units for Impulse are
a)
N/s
b)
N-s
c)
N
d)
m/s
3.
The formula for momentum is
a)
mass divided by velocity
b)
mass multiplied by velocity
c)
velocity divided by mass
d)
Force times acceleration
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.
The law of conservation of momentum states that,
a)
p before is less than p after
b)
p before is the same as p after
c)
p before is more than p after
6.
Energy is lost during this type of collision
a)
elastic
b)
inelastic
c)
energy is lost in both types of collisions
7.
An open cart on a level surface is rolling without frictional loss through a vertical downpour of rain. As the cart rolls, an appreciable amount of rainwater accumulates in the cart. The speed of the cart will
a)
increase because of conservation of mechanical energy
b)
decrease because of conservation of momentum
c)
decrease because of conservation of mechanical energy
d)
remain the same because the raindrops are falling perpendicular to the direction of the cart's motion
8.
On which celestial object would your mass be the greatest?
a)
Earth
b)
Jupiter
c)
Sun
d)
Your mass doesn't change on different celestial objects
9.
A bullet traveling at 500 m/s is brought to rest by an impulse of 50 N*s. What is the mass of the bullet?
a)
10 kg
b)
0.1 kg
c)
0.01 kg
d)
2500 kg
10.
A 35 kg child runs across a store at 4 m/s and jumps onto a 30 kg shopping cart initially at rest. At what speed will the shopping cart and the child move together across the store?
a)
1 m/s
b)
2.2 m/s
c)
5 m/s
d)
6.2 m/s
11.
A bullet with a mass of 0.01 kg collides inelastically with a wooden block of mass 3 kg, initially at rest. After the collision, the bullet and block has a speed of 1.2 m/s. What was the initial speed of the bullet?
a)
50 m/s
b)
101 m/s
c)
301 m/s
d)
520 m/s
12.
In an experiment, a toy wooden car with a mass of 0.3 kg, initially at rest, is struck in the rear by a 0.003 kg dart traveling at 15 m/s as shown. With what speed does the car with the dart stuck in it move after the collision?
a)
0.05 m/s
b)
0.15 m/s
c)
3 m/s
d)
10 m/s
13.
Two pucks are firmly attached by a stretched spring and are held at rest on a frictionless surface. They are released simultaneously. If puck I has 3X the mass of puck II, which of the quantities is the same for both as the spring pulls the two pucks?
a)
Speed
b)
Magnitude of acceleration
c)
Kinetic energy
d)
Magnitude of momentum
14.
A 5 kg ball is lifted 12 m above the ground. It's gravitational potential energy is
a)
60 J
b)
600 J
c)
17 J
d)
2.4 J
15.
Which has a greater momentum a semi-truck at rest or a bicycle in motion?
a)
truck
b)
bicycle
c)
neither has momentum
d)
same
16.
What is the horizontal acceleration of a projectile?
a)
0 m/s2
b)
9.8 m/s2
c)
4.9 m/s2
d)
-9.8 m/s2
17.
What is Newtons 2nd law?
a)
Kinetic Energy = 1/2mv²
b)
Work = Force x distance
c)
Force = Mass x Accelaration
d)
gravitational potential energy = mass x gravity x height
18.
A student obtains data on the magnitude of force applied to an object as a function of time and displays the data on the graph shown. The increase in the momentum of the object between t=0 s and t=4 s is most nearly
a)
40 N·s
b)
50 N·s
c)
60 N·s
d)
80 N·s
19.
The two blocks of masses M and 2M shown above initially travel at the same speed v but in opposite directions. They collide and stick together. How much mechanical energy is lost to other forms of energy during the collision?
a)
1/2 M v²
b)
3/4 M v²
c)
4/3 M v²
d)
3/2 M v²
20.
The graph shows the force on an object of mass M as a function of time. For the time interval 0 to 4 s, the total change in the momentum of the object is
a)
40 kg m/s
b)
20 kg m/s
c)
0 kg m/s
d)
– 20 kg m/s
21.
A 2 kg object initially moving with a constant velocity is subjected to a force of magnitude F in the direction of motion. A graph of F as a function of time t is shown. What is the increase, if any, in the velocity of the object during the time the force is applied?
a)
0 m/s
b)
3.0 m/s
c)
4.0 m/s
d)
6.0 m/s
22.
A ball of mass m with speed v strikes a wall at an angle θ with the normal, as shown. It then rebounds with the same speed and at the same angle. The impulse delivered by the ball to the wall is
a)
mv sin θ
b)
mv cos θ
c)
2mv sin θ
d)
2mv cos θ
23.
A student at rest on a frictionless frozen pond throws a 1.0 kg hammer in one direction. After the throw, the hammer moves off in one direction while the student moves off in the other. Which correctly describes the situation?
a)
The hammer will have the momentum with the greater magnitude
b)
The student will have the momentum with the greater magnitude
c)
The hammer will have the greater kinetic energy
d)
The student will have the greater kinetic energy
24.
The equation to calculate momentum is
a)
p=mv
b)
p=1/2mv2
c)
p=mgh
d)
p=mg
25.
The momentum of an object depends upon the object's ___________&_____________.
a)
size and shape
b)
mass and speed
c)
mass and veloctiy
d)
mass and energy
26.
Determine the momentum of 1000-kg car moving southward at 20 m/s.........
a)
20000 N
b)
20000 Joules
c)
20000 Kg * m/s south
d)
10000 kg * m/s south
27.
A runner has a momentum of 720 kg m/s and is traveling at a velocity of 5 m/s. What is his mass?
a)
14.4 kg
b)
1400 kg
c)
144 kg
d)
360 kg
28.
A 2 kg cart has a momentum of 10 kg m/s. What is its velocity?
a)
22 m/s
b)
.2 m/s
c)
5.0 m/s
d)
20 m/s
29.
An object with a mass of 2000 kg at rest has what momentum?
a)
2000 kg m/sec
b)
0 kg m/sec
c)
2000 kg
d)
2000 m/sec
30.
A 2.5 kg ball moving at 5 m/s collides with a 2.5 kg stationary ball in a perfectly elastic collision. What is the velocity of the second ball after the collision?
a)
5 m/s
b)
2.5 m/s
c)
10 m/s
d)
7.5 m/s
31.
A 9 kg blob moving at 5 m/s collides and sticks to a second blob with a mass of 5 kg. If the two bobs stick together, what will the velocity of the two blobs move at?
a)
3.57 m/s
b)
3.2 m/s
c)
10.0 m/s
d)
9.0 m/s
32.
The impulse is ______ the change in momentum
a)
Greater than
b)
Equal to
c)
less than
d)
always double
33.
When the speed of an object is doubled, its momentum
a)
remains unchanged in accord with the conservation of momentum.
b)
doubles
c)
quadruples
d)
decreases
34.
Momentum is a ____________________ quantity
a)
science
b)
scalar
c)
vector
d)
energy
35.
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)
33.3 N*s
d)
None of these
36.
The impulse is ______ the change in momentum
a)
Greater than
b)
Equal to
c)
less than
d)
always double
37.
In any collision (crash) the ______ is ALWAYS constant
a)
Total Momentum
b)
total speed
c)
total Velocity
d)
Energy
38.
How can a tennis ball and a bowling ball have the same momentum?
a)
have the same speed
b)
have different speeds
c)
one is moving backwards
d)
they can't
39.
In this type of collision, objects tend to "stick" together.
a)
elastic
b)
inelastic
c)
They "stick" together in both types of collisions
40.
Momentum is conserved in this type of collision
a)
elastic
b)
inelastic
c)
momentum is conserved in both types of collisions
41.
T/F: A big truck will always have more momentum than a small car.
a)
True
b)
False
42.
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.
43.
An egg is thrown at a wall and at a bed sheet. The force of impact will be
a)
Greater against the wall
b)
Greater against the sheet
c)
Force is equal
44.
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
45.
Which two quantities can be expressed using the same units?
a)
momentum and energy
b)
energy and force
c)
impulse and force
d)
impulse and momentum
46.
The figure shows a collision between three balls of clay. The three hit simultaneously and stick together. What is the speed_ and direction_ of the resulting blob of clay?
a)
62 m/s @ 10.750 north of east
b)
62 m/s @ 10.750 north of west
c)
3842 m/s @ 10.750 north of west
d)
3842 m/s @ 10.750 south of east
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