Formulas

Question 1

What is the formula that links distance, speed and time?

Answer 1

d=st

Question 2

What is the formula that links acceleration, change in velocity and time?

Answer 2

a=(v-u)/t

Question 3

Calculate distance if final velocity is 4m/s, initial velocity is 1.5m/s and acceleration is 5m/s^2?

Answer 3

1.375m

Question 4

What is the formula that links Force, mass and acceleration?

Answer 4

F=ma

Question 5

Calculate mass if weight is 100N and g is 20N/kg.

Answer 5

5kg

Question 6

Wat is the formula that links mass, velocity and momentum?

Answer 6

p=mv

Question 7

How can you calculate change in momentum?

Answer 7

Change in momentum= Ft

Question 8

A car has a mass of 2500kg is travelling at 30m/s makes an emergency stop with a braking force of 3500N. What is the breaking distance?

Answer 8

321.428571m

Question 9

What is the formula for Kinetic Energy?

Answer 9

KE=0.5mv^2

Question 10

What is the formula for GPE?

Answer 10

GPE=mgh

Question 11

How do you calculate efficiency?

Answer 11

efficiency= useful energy/total energy

Question 12

Calculate wave speed If it travels 4m in 0.5secs.

Answer 12

8m/s

Question 13

What is the wave equation?

Answer 13

v=fλ

Question 14

What is the formula that links work done, force and distance?

Answer 14

E=Fd

Question 15

Calculate Power if Force is 500N, distance is 450m and it takes 2secs.

Answer 15

1125W

Question 16

How do you calculate the moment of a force?

Answer 16

moment=force x distance

Question 17

What is the formula that links charge, current and time?

Answer 17

Q=It

Question 18

What is the formula that links charge, energy and potential difference?

Answer 18

E=QV

Question 19

Calculate resistance if P.d is 9V and current is 0.5A.

Answer 19

18ohm

Question 20

What is the formula that links time, P.d, Current and Energy?

Answer 20

E=IVt

Question 21

What is the formula that links Power, Energy and time?

Answer 21

P=E/t

Question 22

What is the formula that links Power, P.d and Current?

Answer 22

P=IV

Question 23

Calculate current if resistance is 5omhs and Power is 6000W.

Answer 23

34.64A

Question 24

What is the formula that links length of a wire, Magnetic flux density, current and force ?

Answer 24

F=BIl

Question 25

The p.d across the first coil of a transformer is 500V and the current is 5A. The current across the second coil is 10A. Calculate the p.dthrough the second coil.

Answer 25

2500V

Question 26

What is the formula that links the number of coils of wire and the p.d?

Answer 26

Vp/Vs=Np/Ns

Question 27

How do you calculate density?

Answer 27

p=m/V

Question 28

How do you calculate specific heat capacity?

Answer 28

c=Q/mθ

Question 29

Calculate specific Latent Heat if 3kg of a substance with a SHC of 2500J/KgC is heated by 7 Celsius?

Answer 29

17500J/kg

Question 30

What is the formula that links Force, extension and the spring constant?

Answer 30

F=kx

Question 31

What is the formula to work out the energy transferred in stretching?

Answer 31

E=0.5kx^2

Question 32

What is the formula linking Pressure, force and area?

Answer 32

P=F/A

Question 33

Calculate the density of a liquid on earth if the pressure is 550Pa and the height of the column is 500cm.

Answer 33

11.2244898Kg/m^3