Show:
Work
Work-Energy Theorem
Power
Kinetic Energy
Potential Energy
100

The standard unit for work is ?

Joule (J)

100

What is the formula for Work-Energy Theorem?

Wnet=1/2mv^2−1/2mv^2/0


100

What is the SI unit for power?

Watt (W) or (J/s) Joules per second

100

What is the formula for Kinetic Energy?

KE=1/2 m v^2

100

Standard Unit for Potential Energy

Joule (J)

200

Work equals force times what?

Distance

200

Energy - Work Theorem states that the Net work done by the forces on an object equals the change in its(blank blank)

Kinetic Energy

200

Power equals?

Work done divided by the time interval.

200

What energy when released creates Kinetic Energy?

Potential Energy

200

Gravitational potential energy formula

GPE= mass* g* height

300

When is negative work being done?

Negative work is done when the force has a component against or in the opposite direction of the displacement.

300

When can the Work - Energy theorem be applied?

When we know the motion of an object but the value of one or more of the forces acting on the object are unknown.

300

Another way to calculate power is force times(blank).

Velocity

300

A hairball has a mass of 2kg , suppose it travels at 10 m/s. Find the kinetic energy it has.

KE=1/2 (2kg) (10 m/s)^2

KE= 100J

300

How does potential energy differ from kinetic energy?

Potential energy is energy stored while kinetic is energy of motion.

400

Is work a vector or scalar quantity? And why is it only one?

A scalar quantity because it has no direction, only a magnitude.

400

Who made the Work- Energy Theorem?  Hint: Last name is SI unit for Work.

James Joule

400

Is power a scalar or vector quantity and why is it only one?

Power has no direction therefore it is a scalar quantity.

400
Ms Luna weigh 150kg, suppose she runs at 1050 m/s. Find Ms.Luna's Kinetic Energy.

KE= 1/2(150kg)(1050m/s)^2

KE= 78,750J

400

What is the potential energy of a 4kg orange cat on top of a 3 meter high bookshelf? 

GPE= (4kg)(9.8m/s)(3m)

GPE=117.6J

500

A soccer player kicks a ball with a force of 10 N. The ball travels for 30 meters. What is the total work?

W= 300 Joules 

500
Ms.Luna knocks a 0.01kg Expo marker across the floor with a force on 3N. If Ms. Luna did 12J of work, how far did the Expo marker travel?

It traveled 4m

500

For an elevator to go from the top to bottom of a building it takes 950000J of Work. If the elevator takes 50 seconds to go up. How much power does the elevator used to go up?

P= 950000J/50s

P= 1900W

500

What are the 5 main types of Kinetic Energy?

Mechanical, thermal, electrical, sound, and radiant energy.

500

5 main types of potential energy

Elastic, chemical, nuclear, gravitational, and thermal energy.