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Simple Machines
Test Description: Physical science final
Instructions: Answer all questions to get your test result.
1) A variation of an inclined plane is a
A
pulley
B
lever
C
wedge
D
wheel and axle
2) A machine is classified as a compound machine if it
A
has an IMA greater than 1
B
is made up of two or more simple machines that operate together
C
has moving parts
D
is very efficient
3) A wheelbarrow is an example of a
A
lever
B
wedge
C
wheel and axle
D
inclined plane
4) What type of simple machine is found on a water bottle cap?
A
lever
B
pulley
C
wheel and axle
D
screw
5) Which is not a type of simple machine?
A
Wedge
B
Pulley
C
Spring
D
Screw
6) Work is
A
Energy from the sun
B
a type of machine
C
a force that moves an object
D
a force that pulls you towards the Earth
7) A screw is made up of ____ wrapped around a post or rod
A
threads
B
strings
C
springs
8) Jan is using a screwdriver to insert a screw. The screwdriver is being used as
A
a wheel and axle
B
a lever
C
a pulley
D
a screw
9) How much power is necessary to do 50 joules of work in 5 seconds?
A
10 watts
B
5 watts
C
50 watts
D
250 watts
10) Kenny lifts a 150 N bucket of water .5 meters in 3 seconds. What is the amount of work done on the bucket?
A
75 watts
B
25 J
C
75 J
D
25 watts
11) Calculate the work needed to push a block with 4 N of force a distance of 10 meters.
A
2.5 J
B
40 J
C
4 J
D
.4 J
12) Power is measured in units called
A
Watts
B
Joules
C
Newtons
D
Pounds
13) The power of a light bulb that converts electric energy at a rate of 100 joules per second is
A
50 watts
B
40 watts
C
100 watts
D
200 watts
14) Work equals force times
A
energy
B
velocity
C
distance
D
mass
15) A lever needs three things to work
A
a force arm, a lever, and a screw
B
a top, a bottom, and a middle
C
a fulcrum, a load, and effort
16) A hockey puck slides across an ice rink more easily than it does across a rough concrete surface, why?
A
there is less gravity on the ice rink
B
there is less friction on the ice rink
C
there is more friction on the ice rink
D
there is more gravity on the ice rink
17) Which of these shows unbalanced forces at work on an object?
A
a water skier pulled by a boat at a constant 30 mph
B
a bicycle chained to a bike rack at school
C
a car driving at a constant 25 miles per hour on a straight street
D
an ice skater turning as he skates around an ice rink
18) For work to be done on an object
A
the object must not move
B
the object must move, whether or not a force is exerted on it
C
some force need only be exerted on the object
D
the object must move some distance as a result of a force
19) The use of a force to move an object some distance is called
A
power
B
time
C
mass
D
work
20) Which of these is an example of work being done on an object
A
holding a door shut on a windy day so it doesn't blow open
B
pushing a child on a swing
C
trying to push a car that doesn't move out of deep snow
D
holding a heavy piece of wood at a construction site
*select an answer for all questions
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