Mechanical Advantage

Open Ended

Describe how a simple machine, such as a lever, can multiply input force to achieve mechanical advantage in practical tasks.

Multiple Choice

Why is understanding mechanical advantage important in plumbing tasks?

• It helps in choosing the right tools for efficient work

• It makes plumbing tasks more complicated

• It reduces the need for any tools

• It only applies to electrical work

Multiple Choice

Which class of lever has the fulcrum in the middle, with effort applied on one side and resistance on the other?

• Class 1

• Class 2

• Class 3

• Class 4

Multiple Select

Which of the following are examples of Class 2 levers?

• Wheelbarrow

• Crowbar

• Nutcracker

• Bottle opener

Fill in the Blanks

In a third class lever, the

is in the middle.

Multiple Choice

What is the formula used to calculate the effort required in a lever system?

• Effort = Load x Load to fulcrum distance / Effort to fulcrum distance

• Effort = Load / Distance

• Effort = Distance x Load

• Effort = Load + Distance

Open Ended

Given a lever where the load is 150N and the load to fulcrum distance is 0.75m, calculate the effort required if the effort to fulcrum distance is 1m. Show your working.

Fill in the Blanks

Calculate the effort at ‘Y’ required to lift the weight: 1.75 kg

Open Ended

Explain how the concept of 'moment' ensures equilibrium in a lever system, using the example shown in the images.

Multiple Choice

Which of the following statements best describes the mechanical advantage provided by adding an extra wheel to a pulley system?

• It increases the force required to lift the load.

• It decreases the force required to lift the load.

• It has no effect on the force required to lift the load.

• It makes the system less efficient.

Fill in the Blanks

Calculate the force required to lift the mass:

N

Multiple Choice

Which of the following examples best illustrates Newton’s third law of motion as described in the slides?

• A ball rolling down a hill speeds up.

• A hammer exerts a force on a nail, and the nail exerts an equal and opposite force on the hammer.

• A car accelerates when the gas pedal is pressed.

• A pulley system reduces the force needed to lift a load.

Multiple Select

Select all correct statements about velocity ratio and gearing as described in the image.

• A larger driven gear reduces the speed of rotation.

• A smaller driver pulley increases the speed of the driven gear.

• The velocity ratio is the ratio of the diameters of the gears.

• For every 2 turns of the driving gear, the driven gear turns once.

Fill in the Blanks

The driver pulley will turn

times in the process of turning the driven pulley once.

Multiple Choice

Consider the pulleys in the image, what will the speed of the driven pulley be?

• 50 RPM

• 100 RPM

• 200 RPM

• 400 RPM

Open Ended

Explain how the principle of the Archimedes screw can be applied to move water or other materials. What makes this mechanism effective?

Fill in the Blanks

Levers are classified into how many categories? Fill in the blank: Levers fall into

categories.

Open Ended

Explain how mechanical advantage is achieved when using a spanner to tighten a compression nut. Why is it easier compared to tightening by hand?