NEW
Font size
S
M
L
XL
WorksheetsWork, Power & Simple Machines
Total questions: 40
Worksheet time: 40mins
Name
Class
Date
1.
Which one of these is not a reason why we use machines
a)
A machine increases the force put into it.
b)
A machine increases the distance
c)
A machine increase the work performed.
d)
A machine changes the direction of the force put into it.
2.
The unit used to measure work is the
a)
Watt
b)
Newton
c)
Joule
d)
meter
3.
A force exerted over a distance to move an object is ______________________.
a)
power
b)
work
c)
momentum
d)
Watt
4.
A 5000N block is lifted 10 m. How much work was done?
a)
50000 J
b)
5000 J
c)
500 J
d)
50 J
5.
Which situation is work not done?
a)
lifting a 20 pound box off the floor
b)
holding a 20 pound box above the floor
c)
sliding a 20 pound box across the floor
d)
sliding a 20 pound box up an inclined plane
6.
What is the definition of power?
a)
the amount of work an object does
b)
the rate at which force is applied
c)
the amount of matter in an object
d)
the rate at which work is done
7.
What is the equation for calculating power?
a)
distance / time
b)
work x time
c)
work / time
d)
force x distance
8.
Any device that makes work easier is called a ______________________.
a)
Joule
b)
prop
c)
lever
d)
machine
9.
A ______________ is a rope or chain wrapped around a wheel.
a)
wedge
b)
lever
c)
pulley
d)
screw
10.
The efficiency of a machine can be increased by reducing __________________________.
a)
effort
b)
it's force
c)
fulcrum
d)
friction
11.
The unit used to measure power is the
a)
Watt
b)
Newton
c)
Joule
d)
Newton*meter
12.
No machine in existence has 100% efficiency due to ____________________.
a)
magic
b)
friction
c)
smoke
d)
input
13.
A jar lid is an example of which machine?
a)
screw
b)
pulley
c)
ramp
d)
wedge
14.
If a pulley has a mechanical advantage of 3. How much force is needed to lift a resistance of 90 N?
a)
3N
b)
90N
c)
180N
d)
30N
15.
In which of these cases is work being done?
a)
A student sleeps
b)
A student pushes a locked door that does not move
c)
a student carries his chair into another room
d)
A student sits on the carpet
16.
If you use a crowbar to get the lid off of a bucket, what simple machine are you using?
a)
Inclined Plane
b)
Pulley
c)
Wheel and Axle
d)
Lever
17.
Flagpole
a)
wedge
b)
pulley
c)
incline plane
d)
wheel and axle
18.
Stairs
a)
wedge
b)
pulley
c)
inclined plane
d)
wheel and axle
19.
Lightbulb
a)
wedge
b)
pulley
c)
incline plane
d)
screw
20.
Would it be easier to move a box of the same mass up a ramp that was long and gradual or short and steep?
a)
long and gradual
b)
short and steep
c)
Neither of these
d)
Both of these
21.
Identify this simple machine
a)
Lever
b)
Wheel & Axle
c)
Inclined Plane
d)
Screw
22.
What do you call a machine made up of two or more simple machines?
a)
complicated machine
b)
compound or complex machine
c)
comprehensive machine
d)
constructive machine
23.
An inclined plane wrapped around a rod forms this simple machine
a)
lever
b)
pulley
c)
screw
d)
wedge
24.
A simple machine that consists a rigid bar that pivot about a fixed point
a)
lever
b)
pulley
c)
wheel and axle
d)
fulcrum
25.
An axe is an example of a
a)
pulley
b)
inclined plane
c)
screw
d)
wedge
26.
A seesaw is an example of a
a)
wedge
b)
lever
c)
inclined plane
d)
pulley
27.
Which is not a type of simple machine?
a)
spring
b)
screw
c)
pulley
d)
wedge
28.
What type of simple machine is this?
a)
wheel and axle
b)
gear
c)
lever
d)
inclined plane
29.
The fixed point on the lever is called
a)
load
b)
resistance
c)
bar
d)
fulcrum
30.
A flat sloping surface that connects lower and higher elevations. It makes raising objects easier.
a)
wedge
b)
screw
c)
lever
d)
inclined plane
31.
If a ramp is 20 feet long and it's height is 5 feet, what is it's mechanical advantage?
a)
4
b)
5
c)
.25
d)
100
32.
A machine that continues to run and never cease running after its initial work is put into it is called a ______________ machine.
a)
Never stop
b)
Perpetual
c)
Perpetual motion
d)
Rube Goldberg
33.
A lever has a resistance are of .5 meters and an effort arm of 4 meters. What is this levers MA?
a)
2
b)
4.5
c)
.125
d)
8
34.
What is the name of this type of machine?
a)
Johnny Crisp
b)
TV turner oner
c)
Rube Goldberg
d)
Isaac Newton
35.
What class of lever would this be?
a)
1
b)
2
c)
3
d)
4
36.
What type of pulley would this picture be?
a)
Fixed
b)
Moveable
c)
Block and Tackle
d)
Power
37.
What would the MA of this pulley be?
a)
1
b)
2
c)
2.5
d)
It doesn't have an MA
38.
What would the MA of this pulley be?
a)
2
b)
3
c)
4
d)
5
39.
A light bulb uses 200 J of energy every 2 seconds. What is it's power output.
a)
400 W
b)
100 W
c)
1000 W
d)
None of these
40.
The method that we use today to rate the amount of power that an engine can create is called ________________________
a)
Power output
b)
workability
c)
Horsepower
d)
Cowpower
Reset
