Work, Power, and Machines

Front

What is work in physics?

Back

Work is defined as the product of the force applied to an object and the distance the object moves in the direction of the force. It is calculated using the formula: Work = Force x Distance.

Front

What is power in physics?

Back

Power is the rate at which work is done or energy is transferred. It is calculated using the formula: Power = Work / Time.

Front

What is the unit of work?

Back

The unit of work is the Joule (J), which is defined as one Newton meter (1 J = 1 N·m).

Front

What is the unit of power?

Back

The unit of power is the Watt (W), which is defined as one Joule per second (1 W = 1 J/s).

Front

What is mechanical advantage?

Back

Mechanical advantage is the ratio of the load force to the effort force in a machine. It indicates how much a machine multiplies the input force.

Front

How do you calculate mechanical advantage?

Back

Mechanical Advantage = Load Force / Effort Force.

Front

What is a simple machine?

Back

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

Front

What is a lever?

Back

A lever is a simple machine that consists of a rigid bar that pivots around a fixed point called the fulcrum. It is used to lift or move loads.

Front

What is an inclined plane?

Back

An inclined plane is a flat surface that is tilted at an angle to help raise or lower objects with less effort.

Front

What is a screw?

Back

A screw is a simple machine that converts rotational motion into linear motion. It consists of a cylindrical shaft with a helical ridge (thread) wrapped around it.