# 8th Grade Science 2nd Quarter Assessment Practice (Part 1): Question Preview (ID: 12146)

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A seesaw is an excellent example of a ______________.
a) first class lever
b) no class lever
c) third class lever
d) second class lever

A zipline tour utilizes this type of pulley:
a) fixed
b) block and tickle
c) block and tackle
d) movable

A commonly used wedge in the kitchen is a _______.
a) spatula
b) egg whisk
c) knife
d) spoon

Which of the following best describes a compound machine?
a) When you utilize a lever as your simple machine.
b) When you utilize an inclined plane as your simple machine.
c) When you have a simple machine that assists with chemical reactions.
d) When you combine several simple machines to make a more complex machine.

What are the two forces used to determine the mechanical advantage of a machine?
a) input, sideput
b) input, output
c) sideput, throughput
d) input, throughput

To calculate mechanical advantage, use the following equation:
a) Input Force/Output Force
b) Input Force/Input Force
c) Output Force/Output Force
d) Output Force/Input Force

The mechanical advantage of a machine with input force of 8 N, and output force of 40 N is _____.
a) 0.2
b) 32
c) 320
d) 5

Determine the mechanical advantage of a ramp with height 3 m, and length of 30 m.
a) 0.10
b) 27
c) 90
d) 10

Which of the following machines would make it the easiest to move a 100 lb TV?
a) A machine with mechanical advantage of 0.5.
b) A machine with mechanical advantage of 5.75.
c) A machine with mechanical advantage of 4.
d) A machine with mechanical advantage of 2.

As someone increases the height of an inclined plane, what happens to the mechanical advantage?
a) It stays the same.