Work, Energy, and Power

Front

What effect do external forces like an applied force, friction force, or drag force have?

Back

They convert between mechanical energy and other forms of energy to change the total mechanical energy of the system.

Front

Kinetic energy is associated with ---

Back

speed.

Front

Elastic potential energy is energy stored in objects that are compressed or __________.

Back

stored.

Front

A 40-kg person is climbing 3 m up a flight of stairs in 6 seconds. How much power did they exert climbing the stairs?

Back

200 W.

Front

Energy of a rock perched on a cliff is an example of...

Back

gravitational energy.

Front

Define work in physics.

Back

Work is done when a force causes an object to move in the direction of the force.

Front

What is the formula for calculating kinetic energy?

Back

Kinetic Energy (KE) = 1/2 mv², where m is mass and v is velocity.

Front

What is potential energy?

Back

Potential energy is the energy stored in an object due to its position or arrangement.

Front

What is the unit of power?

Back

The unit of power is the Watt (W), which is equal to one joule per second.

Front

What is the relationship between work and energy?

Back

Work done on an object results in a change in its energy.