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- 1. Multiple Choice
Energy stored as a result of position is referred to as ______________ energy.
potential
kinetic
thermal
chemical
- 2. Multiple Choice
Gravitational potential energy is the energy stored in an object as the result of its:
height.
mass.
velocity.
direction.
- 3. Multiple Choice
Ugrav depends upon which of the following pairs?
mass and height
mass and velocity
speed and momentum
weight and size
- 4. Multiple Choice
More massive objects have greater:
gravitational potential energy.
kinetic energy.
thermal energy.
velocity.
- 5. Multiple Choice
To determine the gravitational potential energy of an object, where is the zero-height position?
It is assigned by the one running the experiment.
It is assigned to Earth's surface.
It is assigned to the top of a lab table.
It is assigned to the Earth's core.
- 6. Multiple Choice
Kinetic energy (K) is the energy of motion, and it depends upon which two factors?
mass and velocity
mass and height
speed and direction
weight and size
- 7. Multiple Choice
Kinetic energy (K) is a scalar quantity, it does not have to indicate direction.
True
False
- 8. Multiple Choice
The sum of the kinetic and potential energies of an object is known as its __________________________________.
mechanical energy
Ugrav
momentum
velocity
- 9. Multiple Choice
The work done on an object by a constant force is defined as:
the amount of force applied over a given distance
the mass of an object times its velocity
the height of an object times its weight
the mass of an object times the speed of light squared
- 10. Multiple Choice
The Work-Energy Theorem states that:
the work done by the sum of all forces acting on a particle equals the change in the kinetic energy of the particle.
neither mass nor energy can be created nor destroyed.
the amount of work done on an object would be the same anywhere in the Universe.
work is equal to the sum of all known energy forms.
- 11. Multiple Choice
A stationary object has no:
kinetic energy.
mass.
height.
potential energy.
- 12. Multiple Choice
Which of the following is true concerning the roller coaster car?
The car will have its greatest Ugrav at point (a).
The car will have its greatest potential energy at point (b).
The car will have its greatest Ugrav at point (c).
The car will have its greatest kinetic energy at point (d).
- 13. Multiple Choice
Which of the following is always true of an object with mass as it goes up and down?
The sum of gravitational potential energy and kinetic energy will not change.
Gravitational potential energy will always be greater than kinetic energy
Kinetic energy will always be greater than gravitational potential energy
The kinetic energy depends upon the height of the object above the ground.
- 14. Multiple Choice
Which statement correctly describes the relationship between potential and kinetic energy? Potential energy:
can be converted to kinetic energy.
is always greater than kinetic energy.
is always less than kinetic energy.
is the same thing as kinetic energy.
- 15. Multiple Choice
A boulder sitting on the top of a 55 m tall cliff has a Ugrav of 6900 Joules. The acceleration due to gravity is 9.8 m/s2. What is the mass of the boulder?
12.8 kg
16.1 kg
15.4 kg
20.2 kg
- 16. Multiple Choice
A 0.15kg paper airplane flies in a straight line at a speed of 1.5 m/s. How much kinetic energy does the airplane have?
0.17 J
0.10 J
0.022 J
1.20 J
- 17. Multiple Choice
A student carries a 300 N sandbag 70 m across a field. How much work, in joules, did the student perform?
21000 joules
4.29 Joules
0.23 joules
370 joules
230 joules
- 18. Multiple Choice
A force is applied to an object, but the object does not move. The work done on the object is equal to:
zero, because the object did not move.
the weight of the object in Newtons.
the force applied to the object.
the force multiplied by the weight.
- 19. Multiple Choice
A book falls off a table and free falls to the ground. Has work been done on the book?
Yes
No
- 20. Multiple Choice
A roller coaster car will gain speed as it loses:
height.
velocity.
acceleration.
time.
mass
- 21. Multiple Choice
As the object moves from point A to point D across the surface, the sum of its gravitational potential and kinetic energies:
remains the same
decreases, only
decreases and then increases
increases and then decreases
- 22. Multiple Choice
____________ energy is the ability to do work.
Mechanical
Kinetic
Potential
Thermal
- 23. Multiple Choice
How much work is the boy in the green hat doing if he is pushing the cart 20 m by applying a force of 10 N
200 J
30 J
2.0 J
0.5 J
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