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