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WorksheetsQuiz - Chapter 8: Momentum and Impulse (2/1)
Total questions: 22
Worksheet time: 24mins
A biker with a mass of 75 kg moves along the path with a constant velocity of 5 m/s. What is the biker's momentum?
p = mv
25 m/s
375 m/s
25 kg*m/s
375 kg*m/s
The difference between a car hitting a wall vs. a car hitting a hay stack is:
the Impulse on the car hitting the wall is greater.
the change in momentum of the car hitting the wall is greater.
the force on the car hitting the hay stack is greater.
the collision time of the car hitting the hay stack is greater.
Softer landings tend to:
increase impact force.
increase force.
increase collision time.
increase change in momentum.
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.
Ft = mv
-2.5
-10
-18
-45
A 5 N force is applied to a 3 kg ball to change its velocity from +9 m/s to +3 m/s. The time for the collision is (a) seconds.
Ft = mv
Which ONE of the following units represents the standard metric units of momentum?
Newtons * meter / second
Kilograms * meter / second2
meter / second
Kilograms * meter / second
Which one of these objects has the greater amount of momentum?
A turtle that slowly crosses a road
A parked car
A stop sign
During a collision. an object experiences an impulse. How can this impulse be calculated?
Multiplying force by time
Multiplying mass by velocity
Dividing velocity by time
Multiplying mass by acceleration
During a collision. an object experiences an impulse. The impulse causes and is equal to the _____ of the object?
momentum change
kinetic energy change
force
time
A 2 kg object moving at 5 m/s encounters a 30 N force over a duration of 0.33 seconds. The impulse experienced by this object is (a) . (round to nearest number.)
An egg landing on a soft surface will remain intact. The surface increases the _____ and decreases the _____ during the impact? (Choose all of the correct choices.)
mass
gravity
time
force
A 5 kg ball has a momentum of 30 kg*m/s. What is the speed of the ball?
Ft = mv
150 m/s
35 m/s
6 m/s
5 m/s
Padded dashboards in cars are safer in accidents than non-padded ones because the passenger hitting the dash has...
a) Increased time of impact.
b) decreased impulse.
c) decreased impact force.
d) none of the above.
e) all of the above.
A runner has a momentum of 670 kg m/s and is travelling at a velocity of 9 m/s. What is his mass?
Ft = mv
6030 kg
0.0134 kg
74.4 kg
80 kg
A biker with a mass of 75 kg moves along the path with a constant velocity of 5 m/s. What is the biker's momentum?
P = mv
25 m/s
375 m/s
25 kg*m/s
375 kg*m/s
The units for Impulse are
kg
N⋅s
N
m/s
kg⋅sm
Check all that apply: Momentum involves
speed
direction
mass
force
A pitcher throw a ball in a straight line with a momentum of 12 kg x m/s. the baseball weighs .17 kg. What is the velocity of the ball?
Ft = mv
2.04 m/s
.01 m/s
70.6 m/s
68 m/s
A 4,000 kg pick-up truck uses a braking force of 15,000 newtons (N) to stop in 6 seconds. What is the Impulse?
Impulse = 3.75 N*s
Impulse = 90,000 N*s
Impulse = 24,000 N*s
Impulse = 2,500 N*s
A 75 kg high jumper lands on the mat after her jump. The mat brings her to a stop after 1.5 seconds. She was traveling at 6.5 m/s when she landed on the mat. (Note: The speed of the jumper was 0 m/s at the top of her jump, before she started to fall towards the mat.)
What was the Force felt by the jumper upon impact with the mat?
Ft = mv
Force= 325 N
Force = 11.5 N
Force = 1 N
Force = 487.5 N
