Machine Knowledge

What is the main function of a lever?

• Playing music

• Driving a car

• Cooking food

• Amplify force or distance

Name three examples of simple machines.

• lever, inclined plane, pulley

• gear, axle, wedge

• screw, gear, axle

• wheel, screw, wedge

What is the purpose of a pulley?

• To send emails

• To play music

• To cook food faster

• The purpose of a pulley is to change the direction of a force or transmit rotational motion.

Which machine part is responsible for controlling the flow of electricity?

• switch

• dial

• knob

• lever

Explain how a screw works as a simple machine.

• A screw works by converting linear motion into vertical motion.

• A screw works by converting rotational motion into linear motion.

• A screw works by converting vertical motion into horizontal motion.

• A screw works by converting linear motion into rotational motion.

What is the difference between a wheel and axle and a pulley?

• A wheel and axle can only be used for horizontal movement, while a pulley is only for vertical movement.

• The main difference is that a wheel and axle transfers force over a distance, while a pulley changes the direction of a force.

• The wheel and axle system is more efficient than a pulley in terms of force transmission.

• A wheel and axle is used for lifting heavy objects, whereas a pulley is used for transportation purposes.

Name three common machine parts found in a car.

• Engine, Transmission, Alternator

• Tire, Steering Wheel, Brake Pad

How does a wedge help in making work easier?

• A wedge helps in making work easier by increasing the distance over which a force is applied.

• A wedge helps in making work easier by reducing the force required to perform work.

• A wedge helps in making work easier by converting a force applied over a longer distance into a greater force applied over a shorter distance.

• A wedge helps in making work easier by converting a greater force applied over a shorter distance into a smaller force applied over a longer distance.

Describe the role of an inclined plane in a machine.

• An inclined plane in a machine reduces the amount of force needed to lift an object by increasing the distance over which the force is applied.

• An inclined plane in a machine decreases the distance over which the force is applied

• An inclined plane in a machine increases the force needed to lift an object

• An inclined plane in a machine has no impact on the force required to lift an object

What is the function of a gear in a machine?

• Control temperature

• Transmit motion and power between components

• Store electricity

• Generate heat