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Day 2 Review Unit (4-6)

Total questions: 45

Worksheet time: 54mins

Name
Class
Date
1.
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
2.
Work is done when a weightlifter holds a barbell still above his head.
a)
True
b)
False
3.

If you increase your work and decrease your time, you will have

a)

more power

b)

less power

c)

same amount of power

d)

power rating can not be determined

4.

Person A and Person B are both using the same amount of work to lift something. Person A takes half as much time to do it. Who has greater power.

a)

Person A

b)

Person B

5.
Force is a _____ or _______
a)
simple    complex
b)
push     pull
c)
up      down
d)
in      out
6.
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 
7.
The unit used to measure power is the 
a)
Watt
b)
Newton
c)
Joule
d)
Newton*meter
8.
Which of the following is NOT an insulator?
a)
Wool
b)
Plastic
c)
Copper
d)
Styrofoam
9.
Heat transfers from ______ objects to cold objects. 
a)
Cold
b)
Hot
c)
Convection
d)
Radiation 
10.

The following are conductors EXCEPT-

a)
b)
c)
d)
11.

A spoon in a cup of hot soup becomes warmer

a)

Convection

b)

Conduction

c)

Radiation

12.

Grilling Hamburgers OVER a charcoal flame.

a)

Convection

b)

Conduction

c)

Radiation

13.

A hot air balloon rises because of

a)

Convection

b)

Conduction

c)

Radiation

14.

Two magnets with like poles will _________ each other.

a)

attract (pull together)

b)

repel (push apart)

15.

Two magnets with unlike poles will _________ each other.

a)

attract (pull together)

b)

repel (push apart)

16.

Compasses always point in which direction?

a)

North

b)

South

c)

East

d)

West

17.

The space around a magnet is called its ____________.

a)

electrical field

b)

baseball field

c)

magnetic field

d)

soccer field

18.

Magnets will only be attracted to objects that have this in them.

a)

silver

b)

copper

c)

gold

d)

iron

19.
Magnets have a north and a south ___________
a)
shape
b)
color
c)
pole
d)
region
20.

Which of the symbols represents current in an electrical circuit?

a)

i

b)

c

c)

e

d)

r

21.

An electrical circuit is powered by a 1.5-volt battery and contains a light bulb producing 5 Ohms of resistance. There is also another 5 Ohm resistor in the circuit. How many amps of current are in this circuit? HINT: V = IR

a)

0.15 amps

b)

15.0 amps

c)

6.67 amps

d)

1.50 amps

22.

The diagram below at the right shows a light bulb connected by wires to the + and - terminals of a car battery. Compared to point D, point A is _______________ electric potential.

a)

12 V higher in

b)

12 V lower in

c)

exactly the same

d)

impossible to tell

23.
What is a closed path for electrons to flow through?
a)
static electricity
b)
circuit
c)
amperes
24.
Electricity is the flow of _________.
a)
protons
b)
neutrons
c)
electrons
25.
What type of circuit is pictured?
a)
series
b)
Parallel
26.

Why electrical wiring usually are covered with a layer of plastic?

a)

To make it look pretty

b)

To help electricity flow along the wire

c)

To make it safe

d)

To add more energy

27.

If lamp 1 is unscrewed from its holder, what will happen to lamp 2?

a)

It will get brighter

b)

It will stay the same brightness

c)

It will go out

d)

Nothing will happen

28.

If lamp 2 is unscrewed from its holder, what will happen to lamp1?

a)

It will stay lit

b)

It will go out

c)

It will get dimmer

d)

It will dissapear

29.
this circuit is .....?
a)
open
b)
parallel
c)
closed
d)
The cutest little circuit evah!
30.
If the hair dryer and the vacuum cleaner are both on, what is the power used?
a)
2600 watts
b)
400 watts
c)
2200 watts
d)
1100 watts
31.
The voltage supplied to a circuit is 17 V and the current running through is 10 A. What is the power generated?
a)
170 W
b)
170 A
c)
1.7 V
d)
1.7 W
32.

If W=Fd
Then how much work is done if it takes 20 N to move a box 10 meters

a)

2 N

b)

200 J

c)

20 J

d)

200 N

33.
Which direction is heat flowing in the picture?
a)
from the hand to the ice
b)
from the ice to the hand
c)
heat is not being transferred
d)
there is no way to tell
34.
Heat always moves from an object of __________ temperature to an object of _________ temperature.
a)
moderate, high
b)
higher, lower
c)
lower, higher
d)
zero, high
35.

The pivot point in a lever.

a)

fulcrum

b)

load

c)

effort

36.

This class of lever:

  • -Fulcrum is in the middle

  • -Example: A scale

a)

first

b)

second

c)

third

37.

This class of lever:

-Load is in the middle

-Example: Wheel Barrel

a)

third

b)

first

c)

second

38.

This class of lever:

-Effort is in the middle

-Fulcrum is to be held

a)

first

b)

second

c)

third

39.

This type of pulley does not move.

a)

fixed

b)

movable

c)

block and tackle

40.

This type of pulley, load moves with the pulley.

a)

moveable

b)

fixed

c)

block and tackle

41.

This type of pulley, load moves with the moveable pulley, but a fixed pulley moves everything.

a)

movable

b)

block and tackle

c)

fixed

42.

An example of a movable pulley is...

a)

crane

b)

zip line

c)

light bulb

43.

What is a simple machine?

a)

A tool that reduces the amount of work performed

b)

A tool that increases the amount of work performed

c)

A tool that makes it easier to perform work

44.

You move a 0.8 kg object five meters in 4 seconds. How much power have you generated?

a)

160 watts

b)

10 watts

c)

6.4 watts

d)

17 watts

45.

Brutus is a weightlifter. He completes a lift in 3.5 s, what is the power of Brutus, if he performed 660.0J of work?

a)

2310 J

b)

He performs no work

c)

189 J

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