HPS Simple Machines Quiz

To be considered work, you have to have _____ and _____ through which the force acts.

• speed and direction
• force and direction
• force and distance
• joules and direction

What is useful about machines?

• They reduce the amount of work.
• The reduce the amount of load/resistance.
• They reduce the amount of effort.
• They increase the amount of work.

Simple machines make work easier by _____ the force required by _____ the distance over which the work is done.

• increasing, increasing
• decreasing, decreasing
• increasing, decreasing
• decreasing, increasing

A force applied by a machine to an object is the

• resistance force.
• effort force.
• force field.
• Jedi force.

A force applied to a machiine by a person is the

• resistance force.
• effort force.
• force field.
• Jedi force.

If the force required to lift a barrel into the back of a truck was 124 N without a simple machine, what would the force required to get the barrel into the back of the truck using a ramp? (Think in general; you don't have enough information to calculate.)

• less than 124 N
• more than 124 N
• exactly 124 N

How much work is being done by a penguin pushing a purple piano with a force of 50 N up a ramp that is 8 meters long?

• 50 J
• 40 J
• 400 J
• 6.25 J

Calculate the mechanical advantage of the inclined plane shown below if "L" is 42 meters, "V" is 6 meters, and "H" is 36 meters.

• 4
• 5
• 6
• 7

What would the effort distance have to be on a ramp to raise an object 5 meters, with a mechanical advantage of 3?

• 15 meters
• 1.5 meters
• 1.7 meters
• 17 meters

Identify the class of lever shown below.

• 1st class
• 2nd class
• 3rd class