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Energy And Simple Machines
Test Description: Energy and Simple Machines
Instructions: Answer all questions to get your test result.
1) The kinetic energy of an object increases as its _____ increases
A
potential energy
B
specific heat
C
height
D
velocity
2) A slanted surface used to raise an object is a(n)
A
efficiency board
B
effort ramp
C
inclined plane
D
screw
3) A bar that is free to pivot about a fixed point is a
A
lever
B
fulcrum
C
wedge
D
ramp
4) The work output of a machine compared to the work input is the _____ of the machine.
A
power
B
efficiency
C
effort
D
resistance
5) The unit of power is the
A
joule
B
second
C
MA
D
watt
6) Which of the following CANNOT be done by a simple machine?
A
decrease the amount of work done
B
change the direction of a force
C
decrease the time it takes to do work
D
transfer energy from one location to another
7) How much work is done on an object that is moved 10 m with a force of 2 N?
A
5 J
B
50 J
C
2 J
D
20 J
8) An inclined plane wrapped around a cylindrical post is a
A
block and tackle
B
screw
C
lever
D
wedge
9) An arrangement of pulleys designed to reduce the effort force is called a
A
simple pulley
B
moveable pulley
C
fixed pulley
D
block and tackle
10) Potential energy because of height above Earth’s surface is called _____ potential energy.
A
chemical
B
gravitational
C
mechanical
D
kinetic
*select an answer for all questions
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