What is a lever?

• A mechanical device to produce turning motion about an axis

• A type of electrical circuit

• A chemical compound used in reactions

• A device for measuring temperature

Which of the following best describes the function of a lever?

• It is a rigid bar moving around a fixed point of axis to overcome resistance by applying force

• It is a flexible rope used to lift objects

• It is a container for storing liquids

• It is a device for generating electricity

Why must force be applied to a lever?

• To move it and overcome resistance

• To change its color

• To make it lighter

• To increase its temperature

A lever is considered a simple machine because it is a rigid bar that moves around a fixed point (axis), requiring force to overcome resistance. Which of the following best describes a lever?

• A rigid bar that moves around a fixed point (axis), requiring force to overcome resistance

• A device made of multiple moving parts and uses electricity

• A device used only for decoration

• A flexible device that does not require force

Which of the following best describes a lever?

• A flexible rope used to lift objects

• A rigid structure rotating around a fixed point

• A machine with gears and pulleys

• A flat surface inclined at an angle

Which of the following is NOT one of the three main parts of a lever?

• Load (resistance)

• Effort (force)

• Pivot (fulcrum)

• Spring (tension)

What is the main function of a lever when moving a heavy box with a crowbar?

• To increase the distance the box moves

• To move greater loads with a set amount of force

• To reduce the weight of the box

• To change the direction of the box

How does a lever help when using a golf club or a badminton racquet?

• It increases the weight of the object

• It helps move loads at greater speed

• It reduces the effort needed to lift the object

• It changes the color of the object

Suppose you are designing a tool to lift a heavy object with minimal effort. Based on your understanding of levers, which part of the lever would you adjust to make lifting easier, and why?

• Increase the length of the load arm to increase resistance

• Decrease the length of the effort arm to reduce force

• Increase the length of the effort arm to reduce the force needed

• Place the pivot at the center to balance the lever

What is the name of the point on a lever where it pivots?

• Fulcrum

• Load

• Effort Arm

• Resistance Arm