Understanding Pulleys and Levers--MURRAY

Which of the following statements best describes the mechanical advantage of a pulley system?

• It is the ratio of the output force to the input force.

• It is the ratio of the input force to the output force.

• It is the sum of the input and output forces.

• It is the difference between the input and output forces.

If a lever has a mechanical advantage of 4, what does this imply about the input and output forces?

• The input force is four times the output force.

• The output force is four times the input force.

• The input force is equal to the output force.

• The output force is one-fourth of the input force.

A pulley system is used to lift a load of 200 N. If the mechanical advantage of the system is 5, what is the input force required?

• 20 N

• 40 N

• 50 N

• 100 N

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Which of the following is true about the mechanical advantage of a lever when the fulcrum is closer to the load?

• The mechanical advantage decreases.

• The mechanical advantage increases.

• The mechanical advantage remains the same.

• The mechanical advantage becomes zero.

Calculate the mechanical advantage of a lever where the effort arm is 3 meters long and the load arm is 1 meter long.

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS2-2

In a pulley system with a mechanical advantage of 6, how many supporting ropes are there if the system is ideal and frictionless?

• 2

• 3

• 4

• 6

A lever is used to lift a 500 N load with an input force of 100 N. What is the mechanical advantage of the lever?

• 2

• 3

• 4

• 5

Tags

NGSS.MS-PS2-2

Which type of lever has the fulcrum positioned between the input force and the load?

• First-class lever

• Second-class lever

• Third-class lever

• Fourth-class lever

If a pulley system has a mechanical advantage of 3, what is the effect on the distance the input force must move compared to the load?

• The input force moves the same distance as the load.

• The input force moves three times the distance of the load.

• The input force moves one-third the distance of the load.

• The input force does not move.

Tags

NGSS.MS-PS2-2

A lever with a mechanical advantage of 2 is used to lift a 300 N load. What is the minimum input force required?

• 100 N

• 150 N

• 200 N

• 300 N

Tags

NGSS.MS-PS2-1