General shit

Question 1

What is inextensible

Answer 1

Acceleration of masses is the same

Question 1

What is light

Answer 1

Tension is the same throughout the length of the string and the mas of the string is negligible

Question 2

Newton’s 1st Law

Answer 2

A body stays at rest or maintains a constant velocity unless a resultant force acts on the body

Question 3

Newton’s 2nd Law

Answer 3

The overall resultant force (Fnet) acting on a body is equal to the mass of the body multiplied by the body’s acceleration F=MA

Question 4

Newton’s 3rd Law

Answer 4

For two bodies, A and B, in contact with each other, the force exerted by A on B is equal in magnitude but opposite in direction the force exerted by A on B

Question 5

How do you model a objecy

Answer 5

As a particle, therefore the size is negligible

Question 6

Where does forces act on a object

Answer 6

All forces act at the centre of mass and so do not have any spinning effect

Question 7

Friction

Answer 7

It acts against motion

Question 8

Tention

Answer 8

Is pulling force, prevents two objects moving apart

Question 9

Normal Reaction

Answer 9

Is when a particle is in contact with a surface. It is always at 90 degrees to the surface

Question 10

How to get from radians to degrees

Answer 10

X * 180/pi

Question 11

How do you switch between displacement, velocity and acceleration graphs

Answer 11

Displacement -> Velocity -> Acceleration Differentiation
Acceleration -> Velocity -> Displacement Integration

Question 12

Formula for trapezium stips intergration

Answer 12

1/2 (width) (first height + 2(second height + …) + last height)

Question 13

How to say the new hypothesis is rejected

Answer 13

There is insufficient evidence, so we fail to reject the old hypothesis

Question 14

How to say the new hypothesis is accepted

Answer 14

There is sufficient evidence to accept the new hypothesis

Question 15

What is R (set of numbers)

Answer 15

Real numbers - can be given a value -1, 0, 2.332, e, pi..

Question 16

What is Q (set of numbers)

Answer 16

Rational numbers, fractions can be negative

Question 17

What is Z (set of numbers)

Answer 17

Integers, negative has to be a whole number

Question 18

What is N (set of numbers)

Answer 18

A number that is positive and whole

Question 19

Regression what is it called when it is outside the data

Answer 19

Extrapolation - Unreliable collected data

Question 20

Regression what is it called when it is in data

Answer 20

Interpolation - Fairly reliable as the line is a good fit too data

Question 21

Regression what is it called when it is above the data

Answer 21

Extrapolation - Unreliable no data is collected here