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WorksheetsQuestion Bank for Grade 11 Physics
Total questions: 130
Worksheet time: 2hrs 8mins
What percent is the potential energy at the bottom of the hill?
0%
25%
50%
100%
A student thinks that the spring will be compressed twice as much if the block is released from 2h compared to h. Is this true?
yes
no
solve mgh = 2kx2 for x
a 2kg block compresses a spring 0.1 m that has a spring constant of 100 N / m, what is the potential energy stored?
1 J
0.5 J
0.1 J
5 J
a 2kg block compresses a spring 0.1 m that has a spring constant of 100 N / m, how fast will the block go when the spring is released?
.7 m/s
0.5 m / s
0.1 J
5 J
At which position is the potential energy the greatest?
1
4
5
6
At which position is the potential energy the least?
1
4
5
6
At which position is the kinetic energy the greatest?
1
3
5
6
At which position is the kinetic energy the least?
1
3
5
6
If the coaster has a mass of 735 kg and a height of 95 meters, what is the potential energy at position 1?
7.74 J
34,912.5 J
69,825 J
684,285 J
Ignoring friction, if the PE = 684,285 J at position 1, what is the KE at position 5 (lowest pt)?
0 J
34,912.5 J
69,825 J
684,285 J
Ignoring friction, PE = 684,285 J at position 1, what is the total (mechanical) energy equal to at position 4?
0 J
7.74 J
69,825 J
684,285J
What is the KE at position 4 if the mass of the cart is 735 kg and velocity is 4 m/s?
0 J
1,470 J
2,940 J
5, 880 J
684,285 J
Solve for PE at position 4, given the total (mechanical) energy = 684,285 J and KE = 5,880 J.
0 J
5,880 J
678,405 J
684,285 J
Solve for the height at position 4, given the PE = 678,405 J and the mass of the cart is 735 kg.
0 m
94.2 m
100 m
923 m
What is energy?
Force
The ability to do work
Electricity
The ability to transform work
A 180 gram softball is thrown into the air using 40 J of work. The ball rises to its maximum height in 1.96 seconds. How much power was exerted throwing the ball?
144 W
20.4 W
3.52 W
2.11W
A driver continuously pushes a car stuck in the mud with 900N of force for 70 seconds. The car does not budge. How much work has the driver done on the car?
63000 J
No work
12.9 J
6300 J
How much kinetic energy does an 59,000 kg airplane moving at 223.5 m/s have?
1.32 x 108 J
2.64 x 104 J
1.32 x 107 J
1.47 x 109 J
Ideally, at what point in a pendulum's swing is its mechanical energy the least?
At the bottom of its path
Its mechanical energy is constant throughout
Half way between the top and bottom of its path
At the top of its path
Power is a _______ dependent quantity.
Outlet
Energy source
Time
Volume
Where does the pendulum have the least amount of potential energy?
A
B
C
D
E
A man of mass 50 kg jumps to a height of 1 m. His potential energy at the highest point is(g = 10 m/s2)
(a) 500 J
(b) 50 J
(c) 5 J
(d) 5000 J
What is the unit of measurement for work?
meters
newtons
m/s
Joules
Newtons are the unit for _____________.
Work
Distance
Acceleration
Force
A push or a pull
Work
Force
Acceleration
Speed
You exert 200 J of work by pulling on an object with 20 N of force. What distance is the object moved?
.01 m
10 m
10 J
4,000 m
How high up is a 3200-kg plane if it has 960000 J of potential energy?
10 m
30 m
307200000 m
300 m
Which requires more WORK – a person WALKING up stairs OR a person RUNNING up stairs?
walking
running
they require equal work
no work is required for either because the movement is vertical
Which requires more work:
A. A man lifting a 45 kg TV 1.22 meters onto a truck?
B. A man using a ramp to push the TV twice the distance but with 225N of force?
(g = 10 m/s2)
A
B
Both require the same amount of work
Worker A does 2 times the work in one half the time as does Worker B. Worker A uses...
twice the power as Worker B
the same power as Worker B
four time the power as Worker B
16 times the power as Worker B
Which has the greater kinetic energy:
A 4000 kg truck moving at 11.2 m/s or a 1500 car moving at 22.4 m/s?
The car
The truck
They are about the same
When is work done on an object?
When an object has a net force applied to it.
When an object moves while a net force is being applied to it
When an object doesn't move while a net force is applied to it
When an object is moving without a net force being applied to it
When the weightlifter holds the weight above his head he may get incredibly tired, ...
He is getting tired because he is doing work on the barbell of weights
He is getting tired because his muscles are stretching and squeezing to do work on the barbell of weights
He is now the equivalent of a table with weights on it.
He is getting tired because his muscles are stretching and squeezing, but he is not doing work on the barbell of weights
What just happened in this picture?
The weight lifter did work by lifting the barbells from the floor to above his head.
The weight lifter did not do work when lifting the barbells above his head.
The weight lifter did no work because he is just a table for weights.
The barbells did work on the weight lifter when lifted from the ground to above the weight lifters head.
Which of the following examples has NO work being done? (Choose all that apply)
An archer stretches her bowstring.
An ant carries a leaf cutting from a tree to his colony
An athlete does push-ups on the ground
A book sits on the shelf
An asteroid speeds across the solar system
Which of the following examples has work being done? (Choose all that apply)
An archer stretches her bowstring.
An ant carries a leaf cutting from a tree to his colony
An athlete does push-ups on the ground
A book sits on the shelf
An asteroid speeds across the solar system
The units of measurement for work are?
Newton
Newton*meter
Joule
Watt
Joule per second
A kilojoule is how many joules?
1
100
10,000
100,000
1,000
Suppose that you apply a 100 Newton horizontal force to a box on the floor, which pushes the box 10 meters. How much work do you do on the box?
100 J
1 J
1000J
10000J
1 kJ
How do you calculate power?
Amount of work done divided by the time interval during which the work is done.
Amount of net force applied to an object multiplied by the distance the object moves
Mass multiplied by acceleration
Amount of momentum gained multiplied by the time interval in which the momentum was gained
If a newer better engine has twice the power of an older engine, this means that the newer engine can do what? (Choose all that apply)
The engine can do half the work in twice the time.
The engine can do twice the work in the same amount of time.
The engine can do the same amount of work in half the time.
The engine can do twice the work in twice the time.
The engine can do twice the work in half the time.
What are the units of power?
Watts
Joules per second
Joules multiplied by seconds
Newtons multiplied by meters divided by seconds
Horsepower
What are the two forms of mechanical energy?
elastic
kinetic
potential
chemical
gravitational
To find gravitational potential energy on Earth we use which of the following equations?
PE = m*g*h
PE = m*v*d
PE = m*g*s
PE = m*g/h
PE = m*v/g
The work required to bring an object up to a final speed from rest is called what?
gravitational potential energy
chemical energy
thermal energy
potential energy
kinetic energy
The work required to slow down an object down to rest from some initial speed is called what?
gravitational potential energy
chemical energy
thermal energy
potential energy
kinetic energy
The kinetic energy of an object increases by what factor if the velocity is doubled?
a factor of one half
a factor of double
a factor of triple
a factor of quadruple
The kinetic energy of an object increases by what factor if the mass is doubled?
a factor of one half
a factor of double
a factor of triple
a factor of quadruple
The units of measurement for potential energy are?
Newton
Newton*meter
Joule
Watt
Joule per second
The units of measurement for kinetic energy are?
Newton
Newton*meter
Joule
Watt
Joule per second
Potential energy depends on the ________ and ________ of the object.
Height (position)
Mass
Speed
Friction
Which point has the most potential energy?
G
F
B
A
At which point of the roller coaster is potential energy the greatest?
W
X
Y
Z
The faster an object moves, the ________ kinetic energy it has.
more
less
Kinetic energy depends on the ________ and ________ of the object.
Height (position)
Mass
Speed
Friction
How much gravitational potential energy does a 100kg (220lb.) skydiver have if they jump from 4000 meters?
3920000 J
294 J
180000 J
1225 J
A 6kg cat misjudges a jump and falls 5 meters. How much gravitational potential energy does the cat have? (The cat is fine by the way.)
294 J
180000 J
1225 J
3920000 J
Calculate the potential energy of a car with a mass of 2,500 kg that is on a hill 100 meters above sea level.
250,000 J
2,450,000 J
2,451,663 J
248 J
A 50kg person is running at 7m/s (about 16 mph). How much kinetic energy do they have?
1225 J
180000 J
294 J
3920000 J
What is the unit of measurement for energy?
Newton
Watt
Joule
Metres
A cheetah can run briefly with a speed of 31 m/s. Suppose a cheetah with a mass of 47 kg runs at this speed. What is the cheetah’s kinetic energy?
1457 J
728.5 J
45,167 J
22,583.5 J
The coaster at B is at -
Maximum PE, Minimum KE
Minimum PE, Minimum KE
Minimum PE, Maximum KE
Maximum PE, Maximum KE
The equation E = 1⁄2 mass x velocity2 is used to find which energy store?
Kinetic Energy
Gravitational Potential Energy
The equation E = mass x gravity x height is used to find which energy store?
Kinetic Energy
Gravitational Potential Energy
Which of the following has the largest kinetic energy?
A
B
C
D
A
B
C
D
What is the unit of measurement for Force?
Newton
Watt
Joule
Metres
As a ball falls freely toward the ground, its total mechanical energy (neglecting friction)
decreases
increases
remains the same
Which of the following situations describes a system with decreasing gravitational potential energy?
a girl stretching a horizontal spring
a boy jumping down from a tree limb
a bicyclist riding up a steep hill
a rocket rising vertically from Earth
As a block slides across a table, its speed decreases while its temperature increases. Which of the following two changes occur in the block's energy as it slides?
an increase in both kinetic energy and internal energy
a decrease in both kinetic energy and internal energy
an increase in kinetic energy and a decrease in internal energy
a decrease in kinetic energy and an increase in internal energy
A block weighing 40. newtons is released from rest on an incline 8.0 meters above the horizontal, as shown in the diagram. If 50. joules of heat is generated as the block slides down the incline, what is the maximum kinetic energy of the block at the bottom of the incline?
50 J
270 J
320 J
3,100 J
A 250 kg car is initially at rest at point A on a roller coaster track. The car carries a 75 kg passenger and is 20 meters above the ground at point A. [Neglect friction.]
Calculate the total gravitational potential energy, relative to the ground, of the car and the passenger at point A.
49,050 J
6,500 J
63,765 J
14, 715 J
A 250 kg car is initially at rest at point A on a roller coaster track. The car carries a 75 kg passenger and is 20 meters above the ground at point A. [Neglect friction.]
Calculate the speed of the car and the passenger at point B.
19.81 m/s
392.4 m/s
1700.4 m/s
51.12 m/s
A 250 kg car is initially at rest at point A on a roller coaster track. The car carries a 75 kg passenger and is 20 meters above the ground at point A. [Neglect friction.]
Compare the total mechanical energy of the car and passenger at points A, B, and C.
increases
decreases
remains the same
A boy pushes his wagon at constant speed along a level sidewalk. The graph below represents the relationship between the horizontal force exerted by the boy and the distance the wagon moves. What is the total work done by the boy in pushing the wagon 4.0 meters?
5.0 J
7.5 J
120 J
180 J
A spring with spring constant 16 N/m is compressed by 0.5 m. How much energy is stored in the spring?
1 J
0.25 J
2 J
16 J
The SI unit of Spring Potential Energy is?
Joules
Watts
Newtons
meters
Calculate the force a spring with a spring constant of 16 N/m that is compressed by 0.5 m will exert.
32 N
- 32 N
- 8 N
16 N
Two workers use 100 N of force to move a sofa 2 meters in 2 seconds. How much power is required?
100 watts
400 watts
104 watts
50 watts
Based on the information in the graph, we can predict the Velocity of this object generating aproximately 12,000J of energy to be traveling at ____.
30 m/s
40 m/s
50 m/s
60 m/s
Based on the information in the graph, we can predict the kinetic energy generated from an object at traveling 30 m/sec would be ____.
2000 J
4000 J
6000 J
8000 J
Which term describes the stored energy of an object up off the ground but still at rest?
Potential Energy
Kinetic Energy
Total Energy
Positive Energy
Calculate the impulse on the ball.
(a) = mass x velocity
A soccer ball is moving towards Elena at a speed of 13 m/s. She kicks it in the opposite direction at a speed of 26 m/s. If the ball weighs 0.9 kg, what was the magnitude of the impulse delivered by her foot to the soccer ball?
35.1 N*s
209 N*s
11.9 N*s
92.5 N*s
How much momentum does a soccer ball have if it has a mass of 0.7 kg and is moving at a speed of 33 m/s?
23.1 kgm/s
27.3 kgm/s
2.1 kgm/s
9.3 kgm/s
If a frisbee with a mass of 0.2 kg is traveling through the air at a speed of 77 m/s, how much momentum does it have?
15.4 kg*m/s
3.4 kg*m/s
14.4 kg*m/s
0.4 kg*m/s
Your buddy Rich throws you a frisbee. It goes over your head and lands 120 m away. If the frisbee was in the air for 5 seconds after Rich threw it, what was its average velocity?
24 m/s
600 m/s
325 m/s
115 m/s
A batter in a softball game hits a fly ball that is caught by the centerfielder. The ball weighs 0.7 kilograms, and the player's glove applied a 950 N force over 0.2 seconds to catch the ball. What was the ball's velocity while it was in the air?
271.4 m/s
111.9 m/s
150.0 m/s
8309.6 m/s
DeAngelo throws a rock that flies through the air at a speed of 90 m/s. If it has a momentum of 810 kg*m/s, what is the rock’s mass?
9 kg
1270 kg
18 kg
27 kg
A yellow Ferrari traveling at 150 m/s veers off the road and crashes into a large oak tree, coming to a complete stop in 0.25 seconds. If the Ferrari has a mass of 750 kg, how much force was delivered by the oak tree?
450,000 N
5750 N
175,250 N
360,000 N
Tucker is driving a 1100 kg truck at a speed of 40 m/s. He then applies 3000 N of force to the brakes for 2 seconds. What is his speed now?
34.5 m/s
0 m/s
27.5 m/s
38 m/s
Regina hits a 0.3 kg tennis ball against a wall during PE. The ball has a velocity of 15 m/s before it hits the wall, and a velocity of 9 m/s (in the opposite direction) after it bounces off the wall. What impulse was delivered to the ball by the wall?
7.2 N*s
27.0 N*s
550.2 N*s
3.6 N*s
A 0.6 kg football is flying towards you with a velocity of 50 m/s. How much force is required to catch the ball in 0.5 seconds?
60 N
30 N
300 N
360 N
A 0.6 kg football is flying towards you with a velocity of 50 m/s. How much force is required to catch the ball in 1.0 seconds?
60 N
30 N
300 N
360 N
True or False:
Momentum and Impulse have the same units: kg*m/s
True
False
Your buddy Rich throws you a frisbee. It flies toward you at a speed of 22 m/s. If you use 8.8 N of force to complete the catch over a time interval of 1.0 seconds, what is the frisbee's mass?
0.4 kg
0.05 kg
2.2 kg
4.4 kg
How much force is required to stop a moving object with 400 kg*m/s of momentum in 1 second?
400 N
80 N
200 N
0.5 N
A purple ball and a gold ball each weigh 9.5 lbs. If the purple ball is moving at a velocity of 20 m/s, and the gold ball is moving at a velocity of 100 m/s, which ball has more momentum?
purple
gold
their momentums are equal
You have a 5 kg purple ball and a 1 kg gold ball. If the purple ball is moving at a velocity of 20 m/s, and the gold ball is moving at a velocity of 100 m/s, which ball has more momentum?
purple
gold
their momentums are equal
You have a 5 kg purple ball and a 20 kg gold ball. If the purple ball is moving at a velocity of 20 m/s, and the gold ball is moving at a velocity of 10 m/s, which ball has more momentum?
purple
gold
their momentums are equal
You have a 3 kg purple ball and an 8 kg gold ball. If the purple ball is moving at a velocity of 90 m/s, and the gold ball is moving at a velocity of 33 m/s, which ball has more momentum?
purple
gold
their momentums are equal
