Work & Mechanical Advantage

The formula for work is ______.

• F = W x d

• W = F x d

• E = mc²

• W = E x d

Force is measured in ______.

• meters (m)

• newtons (N)

• pounds (lbs)

• Joules (J)

Simple machines like inclined planes, have what effect on work?

• Decrease the amount of force needed

• Increase the amount of force needed

• Simple machines have no effect on force

In which situation is work being done?

• Mr. G. watches TV on the couch

• A backpack of books is carried down a hallway

• A backpack of books is dragged down a hallway

• Mr. G.'s hair blows in the wind

If you exert 10 N of force lifting a box 1.0 m up to a truck bed how much work did you do?

• 1 J

• 1 N

• 10 N

• 10 J

If you drag a bag of bricks that weighs 50 N up a 10.0-meter long ramp, how much work have you done?

• 50 J

• 500 J

• 1000 J

• 5000 J

What is mechanical advantage?

• How easy it is to use a machine.

• The comparison of the different colours on a machine.

• The comparison of the force produced by a machine and the force applied to the machine.

• A comparison of the speeds of two machines.

What's the formula for mechanical advantage?

• MA = Load force / Effort force

• MA = Load work / Effort work

• MA = Length x Width

• MA = Force x distance