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Potential Energy
Kinetic Energy
Mechanical Energy
Work
Power
100

Define Potential Energy

Stored Energy

Energy caused by position

Ability to do Work

100

Define Kinetic Energy

Energy of motion

100

Define Mechanical Energy

Total Energy of a System

100

Define Work

Transfer of Energy

100

Define Power

How fast work is done

Work done over time

200

Equation for Potential Energy

PE = mgh

200

Equation for KE

KE = (1/2)mv2

200

Equation for ME

ME = PE + KE

200
Write the two equations for Work
W = Fd

W = (1/2)m(vf2-vo2)

200

Equation for Power

P = W/t

300

A ball of mass 10 kg is stuck in a tree branch that is 15 m tall. Find the PE of the ball

1470 J

300

A truck of mass 8,000 kg is driving at a velocity of 36 m/s. Find the KE of the truck

5,184,000 J or 5184 kJ

300

A cart on a roller coaster has a PE of 140 J and a KE of 60 J. Find the carts ME

200 J

300

A 20 N box is pushed a distance of 2 m by a force of 5 N. Find the amount of work done on the bar

10 J

300

Gravity does 10 J of Work on a falling ball in 0.7 s. How much Power did gravity generate? 

14.3 W

400

A cat of mass 5 kg is stuck in a tree. The cat's PE is 5243 J. Find the height of the tree

107 m

400

A car with a mass of 5000 kg has a KE of 6,250 kJ. Find the car's velocity

50 m/s

400
A plane flying at a constant speed of 250 m/s has a mass of 80,000 kg, at an altitude of 975 km, and has a ME of 7.669 x 1011 J. Find the planes PE

7.644 x 1011 m

400

A boy and his bike have a combined mass of 30 kg and accelerates from rest to 5 m/s. Calculate how much work the boy does

375 J

400

How much time does it take a person to do 80 J of Work if they generate 38.2 W of Power?

2.1 s

500

A ball dropped from a building hits the ground with a velocity of 20 m/s. Find the height the ball was dropped from

20.4 m

500

A squirrel knocks an acorn that was hanging 20 m high off a branch and it falls to the ground. Find the acorn's velocity as it hits the ground

19.8 m/s

500

A capuchin monkey in a tree has a mechanical energy of 2000 J, a mass of 3 kg, and is traveling through the tree at an elevation of 60 m. Find the monkey's velocity

12.5 m/s

500

A car of mass 2,000 kg accelerates to a velocity of 50 m/s by doing 900,000 J of Work. How fast was the car initially going?

40 m/s

500

A 2000 kg car accelerates from rest to a velocity of 15 m/s and generates 187.5 kW of power. How long was the car accelerating?

1.2 s