Kinetic + Potential Energy

Question 1

What is Potential Energy ?

Answer 1

This is the energy a body possesses because of its Position or State

Question 2

What is the equation for calculating Potential Energy ?

Answer 2

PE = mgh

PE = mass (kg) x gravity (N/kg) x height (m)

Question 3

If a stone has :
a mass of 200g
a gravity of 10N/kg
& its height above the ground is 5m

What would be your Potential Energy ?
( THE UNIT IS J )

Answer 3

PE = mgh
PE = (200/1000) x 10 x 5
PE = 0.2 x 10 x 5
PE = 2 x 5
PE = 10 J

Question 4

What is Kenetic Energy ?

Answer 4

This is the energy a body possesses because of its Motion

Question 5

What is the Kinetic Energy equation ?

Answer 5

KE = ½m V-squared

KE = {half of the mass (kg)} x {velocity squared (ms-1) squared}

Question 6

If a Rock has :
mass of 3kg
velocity of 6ms-1

What is the Kenetic Energy ?
( THE UNIT IS J )

Answer 6

KE = ½m V-squared
KE = (½ x 3) x 6-squared
KE = 1.5 x 36
KE = 54 J

Question 7

What happens when Potential Energy is lost ?

Answer 7

Kenetic Energy is gained