Mechanical Advantage

What is the equation for mechanical advantage?

• MA=input force*output force
• MA=output force/input force
• MA=input force/output force
• MA= output force - input force

If the mechanical advantage is more than 1.....

• ...REQUIRES THE USER TO APPLY AN EFFORT FORCE TO THE LOAD FORCE

• ...THE LOAD IS NOT MOVING

• ...MEANS THAT THE USER NEEDS TO APPLY A GREATER EFFORT FORCE TO PUSH THE MACHINE FORWARDS. AS A RESULT THE MACHINE GOES FASTER AND FURTHER.

• ...ALLOWS THE USER TO MOVE A LARGER LOAD WITH A RELATIVELY SMALL EFFORT FORCE

If the mechanical advantage is less than 1.....

• ...REQUIRES THE USER TO APPLY AN EFFORT FORCE TO THE LOAD FORCE

• ...THE LOAD IS NOT MOVING

• ...MEANS THAT THE USER NEEDS TO APPLY A GREATER EFFORT FORCE TO PUSH THE MACHINE FORWARDS. AS A RESULT THE MACHINE GOES FASTER AND FURTHER.

• ...ALLOWS THE USER TO MOVE A LARGER LOAD WITH A RELATIVELY SMALL EFFORT FORCE

The unit for mechanical advantage is....

• Newtons

• Meters

• Newton x meters

• Unitless

if a load of a lever is 100 newtons and the force you apply is 20 newtons, what is your mechanical advantage?

• 120 N
• 5 N
• 2000 N
• 80 N

The amount by which a machine multiplies input force is known as the 

• work.
• power.
• output force.
• mechanical advantage.

What is mechanical advantage?

• The advantage a machine has over a bicycle

• A measure of how much a simple machine reduces work

• A measure of when is the best time to use a simple machine

• the number of times a machine increases input force

Using a lever, Joe is able to lift a 10,000 N car off of the ground with a force of 1000 N. What is the mechanical advantage of the lever?

• 1
• 10
• 100
• 1000

If a pulley system has a mechanical advantage of 4, what does that mean?

• This means that it is 4 times easier to lift this load.

• This means you only need a quarter of the effort to lift the load.

• For example, if you lifted 100 kg, it would only take 25 kg of effort.

• All of the above

What is the mechanical advantage if you lift a load of 300 newtons and you only push down with 50 newtons?

• 250
• 50
• 60
• 6