WorksheetsPhysics Energy
Total questions: 35
Worksheet time: 20mins
THE KINETIC ENERGY OF AN OBJECT INCREASES AS ITS ____ INCREASES.
velocity
height
INCREASING THE SPEED OF AN OBJECT ____ ITS POTENTIAL ENERGY.
increases
decreases
does not affect
WHICH OF THE FOLLOWING DEVICES DOES NOT MAKE USE OF ELECTRICAL ENERGY?
Upright piano
Radio
Toaster
Digital Camera
ACCORDING TO THE LAW OF CONSERVATION OF ENERGY, THE TOTAL AMOUNT OF ENERGY IN THE UNIVERSE ____.
changes
remains the same
WHICH OF THE FOLLOWING ENERGY FORMS IS ASSOCIATED WITH AN OBJECT IN MOTION?
potential energy
elastic potential energy
nonmechanical energy
kinetic energy
IF FRICTION IS THE ONLY FORCE ACTING ON AN OBJECT DURING A GIVEN PHYSICAL PROCESS, WHICH OF THE FOLLOWING ASSUMPTIONS CAN BE MADE IN REGARD TO THE OBJECT’S KINETIC ENERGY?
a.The kinetic energy decreases.
The kinetic energy increases
The kinetic energy remains constant.
The kinetic energy decreases and then increases.
WHAT IS THE POTENTIAL ENERGY OF A 1.0 KG MASS 1.0 M ABOVE THE GROUND?
PE = m x g x h
g = 9.8 m/s2
1.0 J
9.8J
10J
96J
Which of the following is the rate at which energy is transferred?
Potential Energy
Kinetic Energy
mechanical energy
power
When an object is lifted 10 m above the ground, it gains a certain amount of potential energy. If that same object is lifted 20 m above the ground, its potential energy gain will be
less
the same
twice as much
half as much
WHICH OF THE FOLLOWING IS TRUE?
A body with zero velocity cannot have any potential energy.
A body with zero acceleration cannot have any kinetic energy.
A body with zero acceleration cannot have any potential energy.
A body with zero velocity cannot have any kinetic energy.
WHICH OF THE FOLLOWING IS A TRUE STATEMENT ABOUT THE CONSERVATION OF ENERGY?
Potential energy is always conserved.
Kinetic energy is always conserved
Total Mechanical energy is always conserved.
Which graph should be used to determine the kinetic energy of the cart?
the position vs. time
the velocity vs. time
both must be used
neither graph are used
WHICH OF THE FOLLOWING STATEMENTS BEST DESCRIBES THE RELATIONSHIP BETWEEN THE CART’S POTENTIAL ENERGY (PE), KINETIC ENERGY (KE), AND TOTAL MECHANICAL ENERGY (TME)?
As the PE increases, the KE and TME are also observed to increase
As the PE increases, the KE decreases, but the TME remains relatively constant.
The TME increases as the PE increases, but the KE remains relatively constant.
There seems to be no pattern in the manner in which the KE, PE and TME change.
HOW MUCH POWER IS GENERATED IF A PERSON APPLIES 200N OF FORCE TO MOVE A BICYCLE 10 M IN 5 S?
P = f x d / t
10,000 Watts
100 Watts
400 Watts
2000 Watts
A 700-WATT GASOLINE ENGINE AND A 300 -WATT ELECTRIC MOTOR BOTH DO 3 J OF WORK. WHICH MACHINE CAN DO THE WORK FASTER?
the gasoline engine
the electric motor
A PERSON USED 500 NEWTONS TO MOVE A FULL WHEELBARROW 30 METERS. HOW MUCH WORK WAS DONE?
W = F x d
15,000 J
16.7 J
0.06 J
530 J
A WEIGHTLIFTER LIFTS A 1,250 N BARBELL 2 M IN 3 S. HOW MUCH POWER WAS USED TO LIFT THE BARBELL?
P = F x d / t
2500 J
3750 J
7500 Watts
833 watts
How much work (energy) is needed to lift an object that weighs 200N to a height of 4 m? W = F x d/t
800 J
50 J
204 J
196 J
HOW MUCH POWER IS NEEDED TO LIFT THE 200-N OBJECT TO A HEIGHT OF 4 M IN 4 S?
P =F x d/t
800 watts
3200 watts
12.5 watts
200 watts
MATCH THE EXAMPLE TO THE PROPER ENERGY TYPE: Food, batteries and gasoline
Elastic Potential
Chemical
Mechanical
Thermal
Gravitational Potential
MATCH THE EXAMPLE TO THE PROPER ENERGY TYPE: The sum of kinetic and potential energy in a system used to do work.
Elastic Potential
Chemical
Mechanical
Thermal
Gravitational Potential
MATCH THE EXAMPLE TO THE PROPER ENERGY TYPE: Vibrations causing an increase in temperature of an object
Elastic Potential
Chemical
Mechanical
Thermal
Gravitational Potential
MATCH THE EXAMPLE TO THE PROPER ENERGY TYPE: A roller-coaster sitting on the highest hill (before it drops)
Elastic Potential
Chemical
Mechanical
Thermal
Gravitational Potential
MATCH THE EXAMPLE TO THE PROPER ENERGY TYPE: A stretched rubber band
Elastic Potential
Chemical
Mechanical
Thermal
Gravitational Potential
What is the work done to slide the box? W= F x d
(a)
How much work is done if the box is lifted 1m instead? W= F x d
(a)
Which method of moving the box requires more work?
(a)
Which method of moving the box would be easier
(a)
ASSUMING THAT EACH STAIR IS THE SAME HEIGHT, THE POTENTIAL ENERGY AT POSITION B WOULD BE
40 J
30 J
20 J
10 J
WHEN THE BALL ROLLS DOWN THE INCLINE, JUST BEFORE IT STRIKES POSITION E, ITS KINETIC ENERGY WILL BE ABOUT
40 J
30 J
20 J
50 J
Which graph should be used to determine the kinetic energy of the cart?
The position versus time graph must be used.
The velocity versus time graph must be used.
Both the position versus time graph and velocity vs time graph must be used.
Neither graph are used. Kinetic energy is calculated without using the graphs.
At which of these times listed does the cart have the lowest kinetic energy?
at 1.10 seconds
at 2.25 seconds
at 2.55 seconds
at 3.12 seconds
FOR WHICH POSITIONS DOES THE CART HAVE THE GREATEST KINETIC ENERGY?
30 cm
50 cm
90 cm
140 cm
Which of the following statements best describes the relationship between the cart’s potential energy (PE), kinetic energy (KE), and total mechanical energy (TME)?
As the PE increases, the KE and TME are also observed to increase.
As the PE increases, the KE decreases, but the TME remains relatively constant.
The TME increases as the PE increases, but the KE remains relatively constant.
There seems to be no pattern in the manner in which the KE, PE and TME change.
Which combination of kinetic energy (KE), potential energy (PE) and total mechanical energy (TME) values would be expected when the cart is located at a position of 90 cm (0.90 m) from its starting location?
KE = 0.43 J, PE = 0.68 J, TME = 1.11 J
KE = 1.80 J, PE = 1.63 J, TME = 3.43 J
KE = 1.63 J, PE = 1.80 J, TME = 3.43 J
KE = 0.26 J, PE = 0.85 J, TME = 1.11 J
