Energy, work, power, machines

Front

What is kinetic energy?

Back

Kinetic energy is the energy an object possesses due to its motion. It depends on the mass of the object and the square of its velocity.

Front

What is potential energy?

Back

Potential energy is the stored energy in an object due to its position or state. For example, a rock at the top of a hill has gravitational potential energy.

Front

What type of energy is stored in food?

Back

Chemical energy is stored in food and is released when the food is consumed and metabolized by the body.

Front

What is thermal energy?

Back

Thermal energy is the energy that comes from the temperature of matter. It is the total kinetic energy of particles in a substance.

Front

What is power in physics?

Back

Power is the rate at which work is done or energy is transferred over time. It is measured in watts (W).

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, and inclined planes.

Front

What is a wheel and axle?

Back

A wheel and axle is a type of simple machine that consists of a larger wheel attached to a smaller axle, allowing for easier movement or lifting.

Front

What is mechanical advantage?

Back

Mechanical advantage is the ratio of the output force produced by a machine to the input force applied. It indicates how much a machine multiplies force.

Front

How do machines reduce the force required to do work?

Back

Machines reduce the force required to do work by increasing the distance over which the force is applied, allowing for easier movement of objects.

Front

What is the formula for calculating work?

Back

Work is calculated using the formula: Work = Force x Distance (W = F x d).