CT Physics preparation

A lever used to lift a heavy box has an input arm of 4 meters and an output arm of 0.8 meters. What is the mechanical advantage of the lever?

• 1

• 2.5

• 5

• 10

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

A 5-meter ramp lifts objects to a height of 0.75 meters. What is the mechanical advantage of the ramp?

• 6.67

• 5.67

• 5

• 6

A 10-meter long ramp has a mechanical advantage of 5. What is the height of the ramp?

• 2

• 5

• 10

• 20

A lever with an output arm of 0.8 meter has a mechanical advantage of 6. What is the length of the input arm?

• 2

• 4

• 6

• 8

If the weight of the block is 10N, how much force does one have to apply to lift it using this pulley (MA=2)?

• 2N
• 5N
• 10N
• 15N

A box of weight W is lifted by a force F using a lever as shown below.

What is the mechanical advantage of the lever (MA=Input Distance/Output Distance)?

• 0.5

• 2

• 3

• 6

which lever type is a wheel barrow?

• type 1

• type 2

• type 3

• none of them

What is the mechanical advantage of a pulley system that looks like this?

• 5

• 8

• 1

• 2

A lever and fulcrum are used to lift a fallen tree, which has a weight of 480 N. If the lever has a mechanical advantage of 5.5, what is the input force that will begin lifting the tree off the ground?

• 5.5 N
• 40.7 N
• 87.3 N
• 2640 N