What is a simple machine?

A type of motor A tool that makes work easier by changing the direction or size of a force A kind of robot A computer program

Which of the following is an example of a lever?

A wheel A seesaw A pulley A ramp

What is the fixed point around which a lever pivots called?

Load Fulcrum Effort Force

What simple machine helps lift heavy loads using ropes and wheels?

Lever Pulley Inclined plane Wedge

How does a catapult demonstrate the use of simple machines?

It uses pulleys to lift objects It uses a lever to store and release energy to launch objects It relies on wheels to reduce friction It uses gears to rotate objects

What is 'mechanical advantage' in simple machines?

The amount of energy lost The ratio that shows how much a machine multiplies force The speed of the machine The total weight of the load

In a pulley system, adding more pulleys usually...

Increases the effort needed Reduces the effort needed to lift a load Makes no difference Stops the load from moving

Which class of lever has the fulcrum between the load and the effort?

First-class lever Second-class lever Third-class lever Fourth-class lever

Which of these is an example of a second-class lever?

Fishing rod Wheelbarrow Scissors Crowbar

Why are simple machines important in engineering and design?

They make designs more colorful They help perform work efficiently by reducing effort They increase energy waste They are only used in toys