Conservation Of Energy

Question 1

Efficiency

Answer 1

Useful/ total

Question 2

Equations
Kinetic
Gravitational
Elastic

Answer 2

0.5mv^2
Mgh g= 9.81
0.5ke^2

Question 3

Forces involved
Throwing ball up
Going down slide
Bouncing trampoline

Answer 3

Kinetic-gravitational
Gravitational-kinetic
Elastic-kinetic-gravitational

Question 4

With these scenarios what would also be present

Answer 4

Frictional forces
Jumping on the trampoline-forces from muscles
- when trampoline stretches forces lost as heat

Question 5

Ignoring friction what can you say

Answer 5

The sum of kinetic and potential energies are constant

Question 6

To fine gravitational energy stored in pendulum you do what
Then how to find maximum speed
700g 50cm to angle 30 degrees to vericle

Answer 6

0.5-0.5cos30 = h
Use gravitational equation
Answer = kinetic energy equation
Find velocity

ALWAYS MEASURE FROM LAST ONE ALL MASS IN LAST

Question 7

What does the conservation of energy shoe

Answer 7

Energy can not be created or destroyed

It can be transferred but the overall remains the same