C3 (Motion) Flashcards

1
Q

Average speed equation

A

Total Distance travelled/ total time taken

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

What does the gradient in a distance time graph represent

A

Speed

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

Instantaneous speed

A

Is the speed of the car over a very short interval of time

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

How to find instantaneous speed

A

Draw a tangent at the point

The gradient is the instantaneous speed

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

Equation for average velocity

A

Change in displacement/ time taken

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

In a displacement time graph what does the gradient represent

A

Velocity

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

Acceleration definition

A

The rate of change of velocity

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

Acceleration definition

A

a= change v/ change t

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

What does the gradient of a velocity time graph represent

A

Acceleration

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

What does the gradient of a velocity time graph represent

A

Acceleration

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

How do u find the displacement of a velocity time graph

A

Area underneath the graph

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

Stopping distance

A

The total distance travelled between the moment when you first see a reason to stop, to when the vehicle CK es to a stop

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

Thinking distance

A

The distance travelled between the moment you first see a reason to stop, to the moment you apply the brakes

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

Braking distance

A

Distance travelled from the time the brake is applied until the vehicle stops

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

Many factors influence these distances

A
Speed of vehicle
Condition of brakes
Tyres 
Road 
Weather conditions
Alertness of the driver
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Equation of thinking distance

A

Speed x Reaction time

17
Q

Free fall definition

A

When an object is accelerating under gravity, with no other forces acting on it, it is said to be in free fall

18
Q

What does the value of g depend on

A

Altitude
Latitude
Geology of an area

19
Q

What are three different ways of measuring the value of g

A

Electromagnet and trap door
Light gates
Taking pictures

20
Q

Projectile motion, assuming that there is no air resistance, what can be stated?

A

The vertical velocity changes due to acceleration of free fall
The vertical displacement and time of flight can be calculated using the equations of motion
Horizontal velocity remains constant

21
Q

What are the two types of friction

A

Contact and fluid friction

22
Q

How does an increase in speed affect the value of friction

A

It also increases

23
Q

What can the force friction never do

A

Speed things up or start something moving

24
Q

What does friction convert kinetic energy into?

25
What decreases terminal velocity
The SA of the falling object
26
A moment
Is the turning effect of a force
27
What does the moment or torque depend on
Force being applied | And it's distance from the pivot
28
Moments must be balanced or...
The objects will turn | Sum of clockwise moments = sum of anticlockwise moments
29
Muscles, bones and joints all act as what?
Levers
30
What is a couple
Pair of forces of equal size which act parallel to each other, but in opposite directions
31
What does the torque depend on
The size of the forces and the distance between them