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WorksheetsReview Quiz- third Periodical Test
Total questions: 63
Worksheet time: 16mins
Which of the following refers to the product of force and distance?
Impulse
Work
Momentum
Power
Which of the following is similar to momentum?
Work
Power
Energy
Mpmentum
What is the unit of measurement for momentum?
Kilogram meter per second
Watt
Newton
Joule
Which of the following equations represents the conservation of momentum?
KE = 1/2 mv^2
m1v1 + m2v2 = m1v1' + m2v2'
F = ma
W = Fd
In a closed system, if no external forces act, what happens to the total momentum?
It becomes zero
It remains constant
It decreases
It increases
Which of the following factors does NOT affect the momentum of an object?
Time
Velocity
Mass
Direction
In a perfectly elastic collision, what happens to the total momentum of the system?
It remains constant
It is converted to energy
It is lost
It doubles
The equation to calculate momentum is
p = m x v
p = 1/2 m x v2
p = m x g x h
p = m x g
What is the unit for momentum?
m/sec
kg/sec
kg/m
kg x m/sec
Which of the following has the MOST momentum? (they are all rolling at the same velocity)
rolling ping-pong ball
rolling bowling ball
rolling soccer ball
rolling basketball
Two identical cars are travelling along EDSA. Car A is travelling at 80 km/hr , while Car B is travelling at 60km/hr. Which of the two cars would have a greater momentum?
Car A
Car B
both have the same momentum
cannot be determined
9. Which has a greater momentum?
jeepney
motorcycle
both have the same momentum
cannot be determined
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.
-2,5
45
10
-18
The impulse-momentum theorem states that
Athe impulse on an object is less than the change in momentum it causes
the impulse on an object is greater than the change in momentum it causes
the impulse on an object is equal to the change in momentum it causes
the force on a moving object is equal to the magnitude of the impulse.
. A 40-kilogram mass is moving across a horizontal surface at 5.0 m/s. What is the magnitude of the net force required to bring the mass to a stop in 8.0 seconds?
1 N
40 N
25 N
5 N
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.
1 N·s
6 N·s
None of these
66 N·s
When the speed of an object is doubled, its momentum...
remains unchanged in accord with the conservation of momentum.
quadruples.
decreases.
doubles.
A 5 N force is applied to a 3 kg ball to slow it down from 9 m/s to 3 m/s. What is the impulse on the ball?
-18 N⋅s
-10 N⋅s
-45 N⋅s
-2.5 N⋅s
A 9300 kg railroad car traveling at a velocity of 5 m/s strikes a second boxcar that weighs 5000 kg at rest. If the first boxcar is at rest after the collision, what speed will the second boxcar move?
The Law of Conservation of Momentum states:
The total momentum before a collision is equal to the total momentum after a collision.
The total momentum before a collision is greater than the total momentum after a collision.
The total momentum before a collision is less than the total momentum after a collision.
The total momentum before a collision is not related to the total momentum after a collision.
A 1200 kg car and a 2400 kg car are lifted to the same height at a constant speed in a auto service station. Lifting the more massive car requires ____ work.
less
the same
twice as much
four times as much
more than four times as much
A job is done slowly, and an identical job is done quickly. Both jobs require the same amount of ____, but different amounts of ____. Pick the two words which fill in the blanks in their respective order.
energy, work
power, work
work, energy
work, power
power, work
Anna Litical is doing the It's All Uphill Lab. She applies a 14.6-Newton force parallel to the inclined plane in order to pull a cart up a hill inclined at an angle of 39.7˚. If she drags the cart a distance of 0.93 m, then how much work does she do upon the cart?
10.45 J
133.06 J
102.38 J
13.58 J
A 10-N force is applied to push a ~2-kg block across a friction free
surface for a displacement of 5 m to the right. Determine the total
amount of work.
250 J
200 J
100 J
50 J
Lamar Gant, U.S. powerlifting star, became the first man to deadlift five times his own body weight in 1985. Deadlifting involves raising a loaded barbell from the floor to a position above the head with outstretched arms. Determine the work done by Lamar in deadlifting 300 kg to a height of 2.0 meters above the ground.
600 J
5880 J
1470 J
zero J
Powerful people or powerful machines are simply people or machines which always do a lot of work.
True
False
Superman applies a force on a truck to prevent it from moving down a hill. This is an example of work being done.
True
False
Winnie and Eeyore have the same mass and have just finished climbing the same tree, but Eeyore was 4 seconds faster then Winnie. Who used the most power?
Winnie as he took the longer time and did the same amount of work as Eeyore
Winnie as he is shorter and could grip more as so did more work overall
Eeyore as he did the same amount of work as Winnie but in a shorter time.
Eeyore as he did more work than Winnie but in a shorter time
A 300-Newton force is applied to a skier to drag her up a ski hill at a constant speed of 1.5 m/s. The power delivered by the toe rope is 450 Watts.
True
False
A force of 80 N is used to pull a 10-kg block at an angle of 60 degrees (shown above) to the right. If the block moves 5 meters to the right, how much work was done on the block.
4000 N*m
200 N*m
2000 N*m
346.4 N*m
400 N*m
In which of the following situations do your arms do work on books?
holding a heavy stack of books while standing
carrying a heavy stack of books
dropping a stack of books onto a table
picking up a pile of books from the floor
In order to do work on an object, the force you exert must be______?
The maximum amount of force you are able to exert.
In a direction opposite to Earth's gravitational force.
In the same direction as the object's motion.
quick and deliberate.
Which of the following statement describes WORK in physics?
Laura did a lot of work moving tables.
Thinking up an answer to this problem is a lot of work.
My flashlight won’t work.
Finishing my assignment about work.
Leo is cutting the grass using a human-powered lawn mower. He pushes the mower with a force of 45 N directed at an angle of 41o below the horizontal direction. Calculate the work that Leo does on the mower in pushing it 9.1 m across the yard.
310J
290J
200J
360J
A 300-Newton force is applied to a skier to drag her up a ski hill at a constant speed of 1.5 m/s. The power delivered by the toe rope is 450 Watts.
True
False
Energy is:
The ability to do work
The amount of power
Movement
Causing things to happen
Kinetic energy is
Stored energy
Force acting on objects
Associated with movement
Measured in speed
Potential energy is:
A type of kinetic energy
A fuel
Associated with movement
Stored energy
Potential energy is equal to:
mass(squared) x gravity x height
mass x gravity x height
mass x pressure x gravity
mass x weight x energy
What type of energy is in this picture?
Kinetic energy
Rubber energy
Elastic energy
Stored energy
The following scenario relates to a rollercoaster:
When at the top of a hill, a cart has _________ energy, as it travels down the track, it has _______ energy.
Kinetic, potential
potential, generational
potential, kinetic
kinetic, exhilirating
If the speed of an object increases, what also increases?
Potential energy
Kinetic energy
What is the gravitational potential energy of an 85 kg mountain climber at the summit of a 6267 m volcano?
Let g = 9.8N/kg
5,220,411 J
532,695 J
73.7 J
54,356.6 J
How much work is done on an object if the amount of force applied is 50 N and the object was displaced by 2 meters from its original position?
100 J
25 J
100 W
25 W
What is the unit of power?
Watts
Kilometres
Joules
Miles
Calculate the kinetic energy of a moving 4.0 kg object travelling at a velocity of 3.0 m/s.
18 J
36 J
12 J
6 J
What is the mass of a moving object that has 100 Joules of kinetic energy and moves at a velocity of 2.0 m/s?
50 kg
200 kg
25 kg
100 kg
The highest point of the transverse wave.
a. amplitude
b. crest
c. trough
d. wavelength
These are waves that travel through a medium like air, water and solids.
a. electromagnetic waves
b. mechanical waves
c. surface waves
d. none of these
It is the distance between two consecutive crests or troughs
a. amplitude
b. frequency
c. wavelength
d. speed
The color of light with the lowest frequency
a. red
b. violet
c. yellow
d. blue
What kind of wave is an electromagnetic wave?
a. a transverse wave
b. a combination of longitudinal and transverse wave
c. a longitudinal wave
d. a shock wave
In a vacuum, the speed of electromagnetic wave ______________
a. depends on its frequency
b. depends on its wavelength
c. depends on its electric and magnetic fields
d. is a universal constant
