Module 3 Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

How is instantanous speed found from a distance time graph

A

Finding gradient of tangent

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Define acceleration

A

Rate of change opf velocity dv/dt

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

How to determine acceleration from a velocity time graph

A

Gradient

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

How to determine displacement from velocity time graph

A

Area underneath (sometimes by counting squares)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

How to calculate stopping distance

A

Thinking distance - Braking distance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

How to calculate thinking distance

A

Speed x reaction time

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

3 methods that can be used to accurately determine g

A

Electromagmet and trapdoor
Lightgates
Taking pictures

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Equation linking mass and weight

A

W=mg

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What can be used ton determine the centre of gravity fro 2D objects

A

Plum line
(weight on a string - when it comes to rest at the centre of gravity)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Define terminal velocity

A

When the drag force of the object is equal and opposite to its weight

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Define moment

A

Force x perpendicular distance
moment = fx

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is the principle of moments

A

For a body in roational equalibrium, the sum of the anticlockwise moments about a point is equal to the sum of the cockwise moents about the same point

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Define couple

A

A pair of equal and opposite forces that bare parralel along different lines

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Define torque

A

Moment of a couple

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

How to calculate torque

A

One of the forces x perpendicular seperation between forces
Torque = fd

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Equation for upthrust

A

Uprthrust = Axpg

17
Q

State Archemedes principle

A

The upthrust exerted on a body immersed in a fluid, whether fully or partially submerged, is equal to the weight of the fluid that the body displaces.

18
Q

Equation for work done

A

Force x distance (in direction of foce)

19
Q

State the principle of conservation of energy

A

The total energy in a closed system remains constant: energy can never be created or destroyed only transferred from on form to another

20
Q

Equation for GPE

A

GPE = mgh

21
Q

Define elastic deformation

A

The spring will retern to its origional length once the force is removed

22
Q

Define plastic deformation

A

Permanent structural chanes to the spring occur and it does not return to its origional length when the force is removed

23
Q

State hookes law

A

The extension of the spring is directly proportional to the force applied as long as the elastic limit of the spring is not exceeded.

24
Q

What is k in f=kx

A

Force constant of the spring

25
Q

Define brittle

A

Elastic behaviour up to breaking point

26
Q

Define ductile

A

Elastic and plastic regions before the material breaks

27
Q

Newtons 1st law

A

An object will remain at rest or continue to move with constant velocity unless acted upon by a resultant force

28
Q

Newtons 3rd law

A

If a body A exerts a force on body B then body B exerts and equal and opposite force on body A

29
Q

Law of conservation of momentum

A

For a system of interacting objects, the total momentum in a specified direction remains constant, as long as no external forces act on the system

30
Q

What is conserved in an elastic collision

A

Kinetic energy

31
Q

Newtons 2nd law

A

The net force acting on an object is directly proportional to the rate of change of its momentum and is in the same direction

32
Q

Equation for newtons 2nd law

A

F=dp/dt
Rate of change of momentum

33
Q

Define impulse

A

Change in momentum (Fxt)