Energy

Question 1

Name The 8 Energy Types

Answer 1

(More Important) Electrical, Kinetic, Potential, Heat.

(Less Important) Nuclear, Sound, Chemical and Light

Question 2

What Is the formula For Kinetic Energy

Answer 2

Kinetic Energy = Half Mass X Velocity Squared

Question 3

What Is the formula for potential Energy

Answer 3

Potential Energy = Mass x Gravity X Hight

Question 4

What Is the Formula For Heat Energy

Answer 4

Heat Energy = Specific Heat Cap X Mass X Delta Temp.

Question 5

What Is the formula for Power

Answer 5

Power = Energy X Time

Question 6

How do you Calculate Efficiency?

Answer 6

( Energy In / Useful Energy out ) * 100 (%)

Question 7

What is the formula for Work Done?

Answer 7

Work Done = Force Applied X Distance moved

Question 8

The Potential Energy of a Ball on a table Is 435 J. The ball then rolls off the table, What is the kinetic Energy of the ball before it hit the ground.

Answer 8

Ep = Ek
Ek = 435 J

Question 9

A small stone is falling from a building. If at the top of the building the Stone had a potential energy of 342 J, What would the kinetic energy be When the stone is Exactly half way though the decent? Whats the Potential Energy?

Answer 9

Ep (1, At the top) = 342

Ek (1, Mid way) = Ep (1) / 2
= 342 / 2
= 171 J
Ep (2) = Ek (1), Ep (2) = 171 J