Formulas And SI Units

Question 1

Formula for momentum

Answer 1

P=mv
Momentum=mass x velocity

Question 2

SI unit of momentum

Answer 2

Kg m/s

Question 3

SI unit for velocity

Answer 3

m/s

Question 4

SI unit of impulse

Answer 4

Kg m/s

Question 5

Impulse formula

Answer 5

I=Ft=mv-mu
Impulse=force x time=final-initial momentum

Question 6

Formula for change in momentum

Answer 6

ΔP= F x Δt

Question 7

What unit do you give if they ask you for the period of a pendulum swing

Answer 7

Seconds, s

Question 8

Explain the advantage of taking multiple readings and then taking an average

Answer 8

Reduces random error
Outliers can be ruled out

Question 9

What is Hooke’s law formula

Answer 9

F=kx

Question 10

Force formula

Answer 10

F=ma

Question 11

What is the formula for kinetic energy

Answer 11

1/2mv^2

Question 12

What is the formula for G.P.E

Answer 12

mgh

Question 13

What the formula for the combination of kinetic and g.p.e

Answer 13

1/2mu^2+mgh=1/2mv^2

Question 14

Formula for energy efficiency%
(Give the one including power as well)

Answer 14

Energy efficiency%=useful energy(power) out/total energy(power) in × 100

Question 15

What is the si unit for pressure

Answer 15

Pa or N/m^2

Question 16

What is the formula for pressure

Answer 16

P=F/A

Question 17

What is the formula for hydrostatic pressure

Answer 17

P= ρgh

Question 18

What is the si unit for density

Answer 18

Kg/m^3

Question 19

What is the formula for pressure and volume

Answer 19

P1 x V1 = P2 x V2