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QUIZ I - WORK POWER ENERGY

Total questions: 35

Worksheet time: 51mins

Name
Class
Date
1.

TRUE OR FALSE: EACH TIME WORK IS MADE, ENERGY IS TRANSFERRED. THE WORK USED TO LIFT A ROCK UP A HILL CAN BE THE SAME ENERGY TO PUSH A LEVER TO LIFT ANOTHER OBJECT

a)

TRUE

b)

FALSE

2.

TRUE OR FALSE: WHEN TWO OBJECTS STRIKE EACH OTHER, COLLISION HAPPENS

a)

TRUE

b)

FALSE

3.

TRUE OR FALSE: PLAYING BILLIARDS IS AN EXAMPLE OF AN INELASTIC COLLISION

a)

TRUE

b)

FALSE

4.

TRUE OR FALSE: WHEN TWO OR MORE OBJECTS STICK UPON IMPACT, IT IS CALLED PERFECTLY OR TOTALLY INELASTIC COLLISION

a)

TRUE

b)

FALSE

5.

A NON-CONSERVATIVE FORCE IS A FORCE THAT ACTS ON AN OBJECT SUCH THAT THE WORK DONE BY THIS FORCE IN MOVING AN OBJECT FROM ONE POINT TO ANOTHER IS DEPENDENT ON THE PATH TAKEN

a)

TRUE

b)

FALSE

6.

True or False: In a third-class lever, the Load applied is between the Fulcrum and Effort

a)

True

b)

False

7.

At it's extreme position, a pendulum has it's maximum potential and minimum kinetic energy

a)

True

b)

False

8.

The law of conservation of momentum states that energy cannot be created nor destroyed, it can only be transformed into other forms.

a)

True

b)

False

9.

Force multiplied by delta time is called the Impulse

a)

True

b)

False

10.

Machines are mechanical devices that complicate and degrade the work performance of human

a)

True

b)

False

11.
Energy of a rock perched on a cliff is an example of...
a)
gravitational
b)
elastic
c)
chemical
d)
kinetic
12.
Energy from a compressed spring would be an example of...
a)
kinetic
b)
elastic
c)
gravitational
d)
chemical
13.
How do you calculate power?
a)
P = W/t
b)
P = E/t
c)
P = w * t
d)
P = bbq/chicken
14.
How do we calculate work?
a)
W = F * d
b)
w = f * D
c)
W = F * D
d)
w = f * d
15.
How much work is being done with 200 N of force over 426 meters?
a)
85,200 J
b)
45,620 J
c)
90,480 J
d)
62,329 J
16.
The SI unit of work is?
a)
Joules
b)
Watts
c)
Newtons
d)
meters
17.
The energy of movement is...? 
a)
Kinetic
b)
Potential
18.
Energy that is stored is called...
a)
Kinetic
b)
Potential 
19.
The SI unit for power is...?
a)
Watts
b)
Joules
c)
Newtons
d)
Meters
20.
What is the formula for Kinetic Energy?
a)
PE = m*g*h
b)
KE = 1/2m*v2
c)
W = F*d
d)
P = W/t
21.
A force exerted over a distance to move an object is ______________________.
a)
power
b)
work
c)
momentum
d)
Watt
22.
If 68 Joules were necessary to move a 4 Newton crate, how far was the crate moved?
a)
272 m
b)
17 m
c)
4.05 m
d)
272 cm 
23.
The faster an object moves, the ________ kinetic energy it has. 
a)
more
b)
less
c)
none of the above
d)
all of the above 
24.
Gravitational potential energy depends on the ________ and ________ of the object. 
a)
Height and mass
b)
Friction and movement
c)
Mass and Movement
d)
Height and Friction 
25.
When you release a stretched rubber band, the rubber band has ________ energy. 
a)
kinetic 
b)
potential
c)
none of the above
d)
all of the above 
26.
Elastic potential energy is energy stored in object that are compressed or __________. 
a)
movement
b)
stored
c)
harnessed
d)
pulled 
27.
What is the formula for calculating the total amount of mechanical energy?
a)
ME = KE + PE
b)
KE = ME + PE
c)
PE = KE + ME
d)
ME = 1/2 mv2
28.
Why does the total amount of mechanical energy stay constant in a system?
a)
energy is not created or destroyed
b)
energy leaves
c)
energy enters
d)
energy is not converted from one form into another
29.
What is the energy of position or shape that depends on weight and height, also called stored energy?
a)
Energy
b)
Kinetic energy
c)
Potential energy
d)
Sound energy
30.
If 150 Joules of work is needed to move a box 10 meters, what force was used? 
a)
1500 N
b)
15 N
c)
1.5 N
d)
150 N
31.

[5 points] How much work is done by a tractor if a large rock is pushed with a force of 5000 N at 2.0 m/s for 20 seconds?

a)

2000 Joules

b)

20000 Joules

c)

200000 Joules

d)

2000000 Joules

32.

[5 points] A standard-sized air conditioner is often rated at the maximum power of 3 kilowatts. Suppose you use this electrical appliance 5 hours a day, what will be your measured energy consumption in killowatt-hours for 30 days?

a)

350 kwh

b)

400 kwh

c)

450 kwh

d)

500 kwh

33.

[5points] What is the kinetic energy of a falling rock with a mass of 3 kg and a velocity of 2 m/s?

a)

2 Joules

b)

3 Joules

c)

6 Joules

d)

10 Joules

34.

[5 points] What is the efficiency of a simple machine having an energy input of 8.0 x 10^3 Joules and energy output of 6.0 x10^3 Joules?

a)

30 %

b)

66%

c)

75%

d)

133.33%

35.

[Bonus Question] What is the second name of your physics teacher?

a)

Christian

b)

Alexander

c)

James

d)

Laurence

e)

None of the above

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