M2.2 Work and Machines

What is the unit of measurement for effort in the inclined plane formula?

• Meters

• Newtons

• Kilograms

• Liters

Which of the following is NOT a simple mechanical advantage device?

• Lever

• Pulley

• Gear

• Computer

What is the mechanical advantage of a lever if the effort arm is twice as long as the resistance arm?

• 0.5

• 2

• 1

• 4

What is the relationship between effort and resistance in a first class lever?

• They are always equal

• They act in the same direction

• They act in opposite directions

• They do not affect each other

What is a lever?

• A rigid bar that turns about a fixed axis

• A flexible rope used to lift objects

• A wheel that rotates on an axle

• A flat surface inclined at an angle

Which of the following is an example of a first-class lever?

• Seesaw

• Nutcracker

• Fishing rod

• Wheelbarrow

What is the formula used to calculate the effort required to lift a weight using a lever?

• E × L = R × l

• E + L = R + l

• E - L = R - l

• E / L = R / l

What happens when you increase the distance from the applied effort to the fulcrum in a first-class lever?

• Increases the mechanical advantage

• Decreases the mechanical advantage

• Has no effect

• Reverses the mechanical advantage

Which of the following is an example of a third-class lever?

• Fishing rod

• Seesaw

• Wheelbarrow

• Scissors

What is the unit of measurement for the resistance of the object in the inclined plane formula?

• Meters

• Newtons

• Kilograms

• Liters