Formulas

Question 1

Work

Answer 1

Work=force X distance w=Fd

Units = Newton*meters (Nm) or Joules (J) 1Nm=1J

Question 2

Potential Energy

Answer 2

Potential Energy= mass X gravity X height PE=mgh

derived from gravitational potential energy = weight x height

Question 3

Weight

Answer 3

Mass X gravity mg

m=numeric form of inertia
gravity= 9.8 m/s^2

Question 4

Gravity

Answer 4

approx 9.8 m/s^2

Question 5

Kinetic Energy

Answer 5

Kinetic Energy=1/2(massXvelocity^2) KE=1/2(mv^2)

1/2 is a constant

speed= delta displacement/delta time

Question 6

Speed

Answer 6

speed= delta distance/delta time

Question 7

Momentum

Answer 7

momentum = mass X velocity

M= mv

Question 8

Impulse

Answer 8

Impulse = Force X time

Question 9

Impulse-momentum relationship

Answer 9

Impulse = change in mass X velocity

Ft= delta(mv)

Question 10

Work-energy theorem

Answer 10

Work = change in kinetic energy

Question 11

Power

Answer 11

Power = work/time interval

P=w/t

Question 12

Average Speed

Answer 12

Average speed = delta distance/delta time

Question 13

Acceleration

Answer 13

Acceleration = delta velocity/delta time

Question 14

Acceleration r/t force

Answer 14

Acceleration = net force/mass

a=Fnet/m

Question 15

Pressure

Answer 15

P=force/area

Question 16

Liquid Pressure

Answer 16

Liquid P= weight densityXdepth

Question 17

Density

Answer 17

d=m/v

Question 18

Speed of liquid leaking through a hole

Answer 18

Speed = square root of (1/2XgravityXdepth below the surface)

Question 19

Boyle’s Law

Answer 19

P1V1=P2V2

Question 20

Coulomb’s Law

Answer 20

Force = k[(q1q2)/d^2]

Question 21

Ohm’s Law

Answer 21

Current = voltage/resistance

I = V/R

Question 22

Power

Answer 22

P=IV