WorksheetsWork, Power, & Energy 2020
Total questions: 25
Worksheet time: 13mins
Which of the following is true regarding work? (choose all that are true) (2)
Work is the product of force & distance
If no movement occurs, then no work is done
Work is the process by which energy changes form
Work is completed when a force is applied to an immovable object.
Work is done when a force acts on an object and it moves
The formula to calculate work is ______________. (3)
Force = Work X Distance
Force = Distance / Work
Work = Force x Distance
Work = Distance / Force
A unit used for work is __________________. (3)
meters (m)
grams (g)
newtons (N)
joules (j)
A man weighing 750 N climbs a flight of stairs 5 m high. How much work has he done? (4)
2000 J
2500 J
3750 J
5050 J
A 10 N book is raised 100 meters from the floor. How much work is done? (4)
10 J
100 J
1000 J
1010 J
Bob does 20 J of work while pushing a shopping cart 2 meters. What is the force applied? (4)
10 N
2O N
40 N
400 N
Saul pulls a 50 N sofa up an incline producing 250 J of work. How far did he pull the sofa? (4)
0.2 m
5 m
25 m
200 m
A 10 kg object is pulled vertically upward 5 m by a rope with an acceleration of 2 m/s2. Find the work done by the tension force in the rope. (4)
4 J
25 J
100 J
225 J
Which of the following are true about power? (choose correct choices) (5)
how work is calculated
the rate of doing work
doing work at a faster rate requires more power
to increase the power, work must be completed quicker
without work, there is no power
Power is equal to ____________________.(6)
force times time
force divided by time
work times time
work divided by time
Which of the following are POWER units? (choose all correct answers) (6)
joules/seconds
watts
joules/hour
kilowatts
joules
A scooter does 500 J of work in 20 seconds. How much power is produced? (7)
25 watts
100 watts
1000 watts
10 000 watts
Teddy does 100 J of work to produce 5 W of power. How long did he work? (7)
0.1 s
20 s
225 s
500 s
Truths about energy (choose all correct answers) (8-12)
Energy is the ability to do work.
Energy is measured in joules
There are 2 types of energy
Kinetic energy is mobile energy
Potential energy is stationary energy or stored energy
KE = 21m× v2 is the equation for ______________.
kinetic energy
potential energy
calculated power input
calculated power output
A 10 kg ball is rolling 3 m/s. How much kinetic energy does it have? (10)
15 J
30 J
45 J
90 J
A 20 kg cart is rolling down a hill with a speed of 5 m/s. What is the carts kinetic energy? (10)
4 J
20 J
100 J
500 J
Gravitational potential energy depends on the object's mass, its height, and ______________________________.(11)
the acceleration due to gravity
the power that the object can generate
the distance the object has already moved
the color of the object
A 10.0 kg rock is sitting on a 10 m ledge. How much potential energy does it have? (12)
98 J
100 J
980 J
1000 J
A 500 kg roller coaster is sitting at the top of the hill 100 meters from the ground. What is the coaster’s potential energy? (12)
7500 J
14900 J
28545 J
490000 J
Which of the following are types of energy transfer? (Choose all that apply) (13)
electromagnetic
nuclear
chemical
thermal
mechanical
Complete the following statement. Energy cannot be created or ______________. (14)
rearranged
destroyed
misspelled
Energy converts from kinetic to potential (and vice versa). When kinetic energy is high, ______________________________. (15)
potential energy is high
potential energy is low
potential energy cannot be determined
The pendulum on a clock swings back and forth. At top of a swing the pendulum has maximum potential energy. When does the pendulum next have maximum potential energy? (16)
When the pendulum the top of its swing on the other side (5)
When the pendulum reaches the lowest location of its swing (3)
When the pendulum returns to the current location (1)
When the pendulum is halfway between the starting and bottom position (2)
The pendulum on a clock swings back and forth. At top of a swing the pendulum has maximum potential energy. When does the pendulum next have maximum kinetic energy? (16)
When the pendulum the top of its swing on the other side (5)
When the pendulum reaches the lowest location of its swing (3)
When the pendulum returns to the current location (1)
When the pendulum is halfway between the starting and bottom position (2)
