P2 Physics - calculating work, power, gpe, KE and momentum

Question 1

whats an everyday example of work done?

Answer 1

walking up the stairs, lifting heavy objects

Question 2

what does the work done depend on?

2 things

Answer 2

size of the force on object

distance object moves

Question 3

whats the equation for work done?

Answer 3

work done = force x distance

Question 4

what is power in simple terms?

Answer 4

measure of how quickly work is being done and how quickly energy is being transfered

Question 5

whats the equation for power?

Answer 5

power = work done / time taken

Question 6

what does the amount of GPE an object on earth has depends on?

Answer 6

mass

height above ground

Question 7

what is the equation for calculating GPE?

what do they stand for

Answer 7

GPE =m x g x h
m = mass
g = gravitational field
h = change in height

Question 8

what happens to an objects KE and GPE when falling through the atmosphere at terminal speed?

Answer 8

its KE does not increase

its GPE is transfered to surroundings as heat

Question 9

what does the KE depend on?

2 things

Answer 9

mas and speed

Question 10

whats the equation for calculating KE

what do they mean

Answer 10

KE = 1/2 x m x v squared 
m = mass
v = speed in metres per second

Question 11

whats the calculation for momentum?

Answer 11

momentum = mass x velocity