Physics As

Front 1

How do you calculate a moment?

Back 1

Moment=Force×perpendicular distance

(Nm=N×m)

Front 2

What is the principle of moments?

Back 2

For an object to be in equilibrium the sum of the clockwise moments must exactly balance the sum of the anticlockwise moments.

Front 3

Whats the difference between a vector and a scalar quantity?

Back 3

Vector quantity - magnitude and direction

Scalar quantity- magnitude

Front 4

What is suvat equation #1?

Back 4

V=at+u

Front 5

What is suvat equation #2?

Back 5

S=1/2 (u+V)t

Front 6

What is suvat equation #3?

Back 6

S=ut+1/2at^2

Front 7

What is suvat equation #4?

Back 7

V^2=u^2+2as

Front 8

What is Avogadros constant and what is it defined as?

Back 8

6.02×10^23 mol^-1

It is the amount of atoms in one mole.

Front 9

What is plancks constant?

Back 9

6.63×10^-34 Js

Front 10

What is the speed of light?

Back 10

3.00×10^8 ms^-1

Front 11

What are the equations relating, Energy, Wavelength and frequency?

Back 11

E=h•f

And

C=f•wavelength (lambda)

Front 12

What is the equation for density?

Back 12

P (rho)=M/V (measured in pascals/kgm^-3)

Front 13

What is the equation for kinetic energy?

Back 13

K.E=1/2mv^2

Front 14

What are the conditions for a system to be in equilibrium?

Back 14

-The resultant force is zero

-The net moment is zero

Front 15

What is the equation for average speed (or velocity)?

Back 15

Distance (or displacement)/time

Front 16

What does the gradient give on a displacement-time graph?

Back 16

Velocity

Front 17

What does the gradient and the area under graph give on a velocity-time graph?

Back 17

Gradient - acceleration

Area - displacement

Front 18

What does the gradient and the area under graph give on a speed-time graph?

Back 18

Gradient - acceleration

Area - distance

Front 19

What does the area under graph give on a acceleration-time graph?

Back 19

Area - velocity

Front 20

What forces are acting upon an object during freefall?

Back 20

Only gravity is acting upon the object

Front 21

What are the 3 Newtonian laws?

Back 21

N1- an object will be at rest or constant velocity unless acted upon by an external force.

N2- (sigma)F=ma if mass is constant

N3- for every action force there is an equal but opposite reaction force

Front 22

What do the terms Rough and Smooth mean?

Back 22

Rough- friction is to be considered

Smooth- frictionless

Front 23

What is the equation for momentum?

Back 23

P=mv (kgms^-1 / Ns)

Front 24

What is the principle of conservation of momentum?

Back 24

The vector sum of momenta of the bodies in a system is constant, as long as there is no resultant force acting from outside the system.

Front 25

What is the definition of an elastic collision?

Back 25

A collision where kinetic energy is conserved.

Front 26

What is an inelastic collision?

Back 26

A collision where some kinetic energy appears to be lost. It is transferred to other forces.

Front 27

What is the equation for work done?

Back 27

Wd=f•d (in direction of force)

Front 28

What is the equation for potential elastic energy?

Back 28

Elastic p.e=1/2Fx

Front 29

What is hookes law?

Back 29

F=kx

Front 30

What is the principle of conservation of energy?

Back 30

Energy may not be created nor can it be destroyed, it can only be changed into other forms.

Front 31

What is the equation for gravitational potential energy?

Back 31

Gravitational P.E= mgh

Front 32

How do you realte work done to energy?

Back 32

Wd=change in energy

Front 33

What are three equations for power?

Back 33

P=Fv

P=Wd/t

P=Energy transfer/t

Front 34

What is stress calculated by?

Back 34

Its measured in pascals (Nm^-2)

Front 35

What is strain calculated by?

Back 35

This is dimensionless.

Front 36

How do you calculate young modulus?

Back 36

Measure in Nm^-2 or pascals

Front 37

What are the 3 classifications of solid and an example of each?

Back 37

Crystalline - metal

Amorphous - glass

Polymeric - plastics

Front 38

What is edge dislocation?

Back 38

It is an additional half-plane of ions in a crystalline solid

Front 39

What is giga in terms of ×10^n?

Back 39

×10^9

Front 40

What is mega in terms of ×10^n?

Back 40

×10^6

Front 41

What is kilo in terms of ×10^n?

Back 41

×10^3

Front 42

What is deci in terms of ×10^n?

Back 42

×10^-1

Front 43

What is centi in terms of ×10^n?

Back 43

×10^-2

Front 44

What is milli in terms of ×10^n?

Back 44

×10^-3

Front 45

What is micro in terms of ×10^n?

Back 45

×10^-6

Front 46

What is nano in terms of ×10^n?

Back 46

×10^-9