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Work And Machines
Test Description: Work and Machines
Instructions: Answer all questions to get your test result.
1) When you exert a force on an object that causes the object to move.
A
power
B
watt
C
work
D
machine
2) For work to happen, when a force is applied:
A
the forces should be balanced.
B
the object must go the same direction as the force.
C
the object should not move.
D
the object must go the opposite direction as the force.
3) The joule measures:
A
forces.
B
watts.
C
power.
D
work.
4) Work depends on:
A
mass and distance.
B
force and roughness.
C
force and distance.
D
speed and direction.
5) The rate that energy is transferred.
A
joules
B
power
C
machines
D
work
6) Power is measured in:
A
forces
B
joules
C
watts
D
motion
7) A device that makes work easier by changing the size or direction of the force.
A
work
B
machine
C
force
D
power
8) The work you put into a machine.
A
forces
B
work input
C
work output
D
machining
9) The work a machine puts out.
A
work input
B
power
C
friction
D
work output
10) The number of times the machine multiplies force.
A
mechanical advantage
B
simple machine
C
power advantage
D
force input
11) A simple machine with a bar that pivots at a fixed point, called a fulcrum.
A
screw
B
inclined plane
C
lever
D
pulley
12) A wheelbarrow is an example of a______class lever.
A
first
B
second
C
third
D
fourth
13) Scissors would be an example of a _______ class lever.
A
fourth
B
second
C
third
D
first
14) A teeter-totter would be an example of a _______ class lever.
A
second
B
third
C
fourth
D
first
15) Your forearm would be an example of a _______ class lever.
A
third
B
fourth
C
second
D
first
16) A simple machine that has a grooved wheel that holds a rope or cable.
A
pulley
B
wedge
C
screw
D
lever
17) Block and tackle pulleys are very efficient because of the:
A
extra wheels and rope segments.
B
magic pulley gnomes
C
fewer wheels and rope segments.
D
extra force that is required.
18) A simple machine with two circular objects of different sizes.
A
wheel and axle
B
pulley
C
screw
D
lever
19) Turning the wheel on a wheel and axle results in a mechanical advantage because:
A
the wheel needs more force.
B
the wheel radius is smaller than the axle radius.
C
magic wheel gnomes.
D
the wheel radius is larger than the axle radius.
20) The greater the length is in relation to the height of an inclined plane, the___________the mechanical advantage is.
A
smaller
B
less force
C
more equal
D
greater
*select an answer for all questions
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