Equations

Question 1

Equations for average velocity?

Answer 1

Average velocity = displacement / time

Question 2

Equation for acceleration?

Answer 2

Acceleration = change in velocity / time

Question 3

Equation for momentum?

Answer 3

Momentum = mass x velocity

Question 4

Equation for average speed?

Answer 4

average speed = total distance / total time

Question 5

Equation for weight?

Answer 5

weight = mass x gravitational field strength

Question 6

Equation for work done?

Answer 6

work done = force x distance along the line of the action of the force

Question 7

Equation for force applied to a spring?

Answer 7

force applied to a spring = spring constant x extension

Question 8

Equation for distance travelled?

Answer 8

distance travelled = speed x time

Question 9

Equation for resultant force?

Answer 9

resultant force = mass x acceleration

Question 10

Equation for kinetic energy?

Answer 10

Kinetic energy = 0.5 x mass x speed(squared)

Question 11

Equation for gravitational potential energy?

Answer 11

gravitational potentional energy = mass x gravitational field strength x height

Question 12

Equation for power?

Answer 12

power = work done / time

Question 13

Equation for efficiency?

Answer 13

effiency = useful output energy transfer / total input energy transfer

Question 14

Equation for wave speed?

Answer 14

wave speed = frequency x wavelength

Question 15

Equation for charge flow?

Answer 15

charge flow = current x time

Question 16

Equation for potential difference?

Answer 16

current x resistance

Question 17

Equation for power?

Answer 17

power = potential difference x current

or

power = (current)2 x resistance

Question 18

Equation for energy transfered?

Answer 18

energy transfered = power x time

or

energy transfered = charge flow x potential difference

Question 19

Equation for density?

Answer 19

density = mass / volume