Unit 4 Test Review: Work, Energy and Power

Front

How do you calculate power?

Back

P = W/t (Power is the rate at which work is done or energy is transferred.)

Front

What kind of energy is in a rock at the edge of a cliff?

Back

Potential energy (It is the energy stored due to its position.)

Front

You exert 200 J of work by pulling on an object with 20 N of force. What distance is the object moved?

Back

10 m (Using the formula W = F * d, rearranged to d = W/F.)

Front

What is a push or a pull?

Back

Force (Force is an interaction that causes an object to change its velocity.)

Front

What is the formula for kinetic energy?

Back

KE = 1/2 mv² (Kinetic energy is the energy of an object in motion.)

Front

What is the unit of work?

Back

Joule (Work is measured in Joules, which is equivalent to one Newton meter.)

Front

What is the relationship between work and energy?

Back

Work is done when energy is transferred from one system to another.

Front

What is the formula for calculating work?

Back

W = F * d (Work is the product of force and distance.)

Front

What is the definition of mechanical energy?

Back

Mechanical energy is the sum of potential and kinetic energy in a system.

Front

What is the unit of power?

Back

Watt (Power is measured in Watts, where 1 Watt = 1 Joule/second.)