Simple Machine - 1

What is the formula for calculating mechanical advantage?

• MA = Output Force / Input Force

• MA = Force x Distance

• MA = Input Force / Output Force

• MA = Output Work / Input Work

If a lever has an effort arm of 4 meters and a load arm of 2 meters, what is its mechanical advantage?

• 2

• 5

• 1

• 3

How do you calculate the velocity ratio of a lever?

• VR = Length of Effort Arm + Length of Load Arm

• VR = Length of Effort Arm / Length of Load Arm

• VR = Length of Load Arm / Length of Effort Arm

• VR = Length of Load Arm - Length of Effort Arm

What is the formula for the velocity ratio of a pulley system?

• VR = Effort force / Load force

• VR = Distance moved by load / Distance moved by effort

• VR = Load weight / Effort weight

• VR = Distance moved by effort / Distance moved by load

If a pulley system has 5 supporting ropes, what is its velocity ratio?

• 7

• 10

• 3

• 5

Explain how mechanical advantage is different from velocity ratio.

• Mechanical advantage is the same as velocity ratio.

• Mechanical advantage is only relevant in simple machines.

• Velocity ratio measures force amplification.

• Mechanical advantage measures force amplification, while velocity ratio measures speed and distance change.

How does the position of the fulcrum affect the mechanical advantage of a lever?

• The fulcrum position has no effect on the lever's performance.

• Moving the fulcrum always decreases the mechanical advantage.

• The position of the fulcrum affects the mechanical advantage by changing the ratio of distances, allowing for greater or lesser force amplification.

• The fulcrum only affects the speed of the lever, not the force.

What is the velocity ratio of a single fixed pulley?

• 3

• 1

• 2

• 0.5

What is the mechanical advantage of a second-class lever?

• Less than 1

• Equal to 1

• Zero

• Greater than 1

In what situation would you use a compound pulley system?

• When lowering loads quickly.

• When lifting light objects easily.

• When securing items in place.

• When lifting heavy loads with less effort.