Work and Energy

Question 1

Speed is related to what?

Answer 1

kinetic energy

Question 2

Kinetic energy formula?

Answer 2

K = 1/2 mv²

Question 3

What are the units of joules?

Answer 3

J = Nm (kg*m² / s²)

Question 4

What are the two kinds of mechanical potential energys?

Answer 4

U = 1/2kx² (elastic)

U = mgh (gravitational)

Question 5

Work two formulas?

Answer 5

W = F*d

W = PΔV

Question 6

Efficiency of work equation

Answer 6

Efficiency = W_out/W_in = (load)(load distance) / (effort)(effort distance)

Question 7

W_net equation

Answer 7

W_net = ΔK = K_f - K_i

Question 8

W_{nonconserative} equation = ?

Answer 8

W_{nonconservative} ΔE = ΔK + ΔU