1.4 energy concepts

Question 1

work done

Answer 1

energy transferred in moving an object. it is the product of the magnitude of the force and distance moved in the direction of the force

Question 2

energy of a system

Answer 2

amount of work the system can do

Question 3

rate of work done / energy transfer =

Answer 3

power

Question 4

work done equation

Answer 4

Fxcos()

Question 5

friction

Answer 5

resistance to motion between an object and a surface or an object moving through fluid. a force that acts in the opposite direction to movement

Question 6

KE

Answer 6

the energy associated with the motion of an object with mass
Ek = 1/2 mv^2

Question 7

GPE

Answer 7

the energy stored in an object due to its position in a gravitational field
Ep = mgh

Question 8

EPE

Answer 8

energy stored by an object as a result of a reversible change in shape
Ep = 1/2 kx^2

Question 9

principle of conservation of energy

Answer 9

energy cannot be created or destroyed, only transferred into other forms.
total energy in a closed sytem will always remain the same

Question 10

work energy relationship

Answer 10

Fx = 1/2 mv^2 - 1/2 mu^2