Work, Energy, Power

Units/Symbols

100

What are the Units for Force?

(N) Newtons

200

What are the units for Energy and Work?

(J)Joules

300

What does x represent with the equation for Elastic Potential Energy?

x = displacement (spring or elastic)

400

What are the Units for Power

(W) Watts

500

What does k represent?

k = spring constant

Conceptual

100

A student is pushing on a wall with 500N. How much work is being done on the wall?

0J

200

When a car comes to a stop, what force does negative work?

Force of Friction

300

Two people climb the same set of stairs. Person A runs to the top. Person B walks to the top.  Which person delivers more power?

Person A

400

At the top of a roller coaster the cars have Gravitational Potential Energy. What type of energy do they primarily have when they are at the lowest point of the roller coaster?

Kinetic Energy

500

Daily Double

If the velocity of an oject doubles, by what factor does its kinetic energy change?

Equations

100

What does the following equation equal?

Fdcos(theta) = ?

Work

200

Equation for GPE?

GPE=mgh

300

Equation for KE?

KE = 1/2 * m * v^2

400

Equation for Power?

P = W/t

Power = Work/Time

500

Equation for Elastic Potential Energy

EPE = (1/2) * k * x^2