Simple Machines and Force and Motion

Front

What is a simple machine?

Back

A simple machine is a device that changes the direction or magnitude of a force, making work easier. Examples include levers, pulleys, wedges, screws, inclined planes, and wheels.

Front

What type of simple machine is a knife?

Back

A knife is a wedge.

Front

What is friction?

Back

Friction is a force that opposes the motion of an object, occurring when two surfaces come into contact.

Front

How does changing the surface affect friction?

Back

Changing the surface can increase or decrease friction; for example, a smoother surface like wax paper reduces friction compared to a rough surface like sandpaper.

Front

What type of simple machine is a nail?

Back

A nail is a wedge.

Front

What happens to the gravitational force on an object as its mass increases?

Back

As an object's mass increases, the gravitational force acting on it also increases.

Front

What type of simple machine is a light switch?

Back

A light switch is a lever.

Front

What is the formula for calculating gravitational force?

Back

The formula for gravitational force is F = m * g, where F is the force, m is the mass of the object, and g is the acceleration due to gravity.

Front

What are the six types of simple machines?

Back

The six types of simple machines are lever, pulley, inclined plane, wedge, screw, and wheel and axle.

Front

How does a lever work?

Back

A lever works by using a fulcrum to pivot and amplify the force applied, allowing a smaller force to lift a heavier load.