Science Quiz Block 5

What is the mechanical advantage of a ramp that is 9 m long and 3 m high?

• 27

• 3/9

• 3

• 12

What is the mechanical advantage of a 4 cm screw that has a thread length of 12?

• 4/12

• 3

• 36

• 16

What is the mechanical advantage of a wedge that has a length of 21 cm and is 6 cm wide?

• 3.5

• 126

• 6/21

• 3.8

How does an inclined plane work?

• A    A small input force is exerted over a long distance.

• B    A large output force is exerted over a long distance.

• C    The input force is exerted in the direction opposite to the output force.

• D    The input force is in the direction of the output force, but is larger.

Kevin has to pull a wagon up five feet to a dock. How does using an inclined plane make Kevin's task easier?

• A    The inclined plane decreases the amount of motion needed to lift the wagon.

• B    The inclined plane decreases the amount of work needed to lift the wagon.

• C    The inclined plane decreases the amount of force needed to lift the wagon.

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• D          The inclined plane decreases the distance over which the force is applied