Mechanical Advantage and Simple Machines

This pulley

• has a mechanical advantage of 1 and does not make work easier.

• has mechanical advantage of 2 and reduces the force needed to lift an object.

• has a mechanical advantage of 2 and changes the direction of the applied force.

• has a mechanical advantage of 1 and changes the direction of the force needed to lift an object.

Tags

NGSS.MS-ETS1-1

To lift a load off the ground, the force required is equal to the weight of the load. In case of a lever, however, a small effort force can be used to lift a much heavier load. How is this possible?

• Levers use the weight of the load combined with the effort to lift the load.

• Levers combine the weight of the load with the force of gravity to lift the load.

• Levers reduce the force required by increasing the distance over which the force is applied.

• Levers distribute the load over their length, thereby reducing the force required to lift the load.

What is the primary mechanical advantage of using the simple machine seen in the image?

• You can apply a small input force and have it multiplied into a large output force.

• You can apply a large input force and have it multiplied into a small output force.

• You can apply a small input distance and have it multiplied into a large output distance.

• You can apply a large input distance and have it multiplied into a small output distance.

Tags

NGSS.MS-PS2-1

A sales clerk at a local hardware store sells you a hammer with a mechanical advantage of 10 when used to pry up nails. You are able to create a force of 60 N. Using the hammer, what would be the maximum force that could be generated to remove a nail?

• 0.167 N

• 6 N 

• 600 N

• 6000 N

Which is not a type of simple machine?

• spring

• screw

• pulley

• wedge

Identify this simple machine

• Lever

• Wheel & Axle

• Inclined Plane

• Screw

Tags

NGSS.MS-PS2-2

Which of the following does a simple machine do?

• allows the users to apply less force over a longer distance

• reduce the amount of force needed to do work

• change the direction of the applied force

• all of the above

Which is an example of someone using a simple machine to do work?

• a boy runs across a football field

• a banker counts money

• a mother pushes a stroller up a ramp

• a girl eats a sandwich

An inclined plane wrapped around a rod forms this simple machine 

• lever

• pulley

• screw

• wedge 

Which simple machine would be the MOST efficient for lifting an object 30 meters off the ground?

• pulley

• screw

• wedge

• lever

Tags

NGSS.MS-ETS1-2

NGSS.MS-PS2-1