Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Nat 5 Physics - Unit 1 > 3. Dynamics > Flashcards

3. Dynamics Flashcards

You may prefer our related Brainscape-certified flashcards:
Physics 101 flashcards AP® Physics flashcards
1
Q

What is the definition of speed?

A

Speed is the distance travelled per unit of time

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

What is the speed, distance and time formula?

A

d = vt

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

What is the average speed formula?

A

-

v = d / t

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

What is the definition of instantaneous speed?

A

The speed of an object at any given moment

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

What device can be used to measure instantaneous speed?

A

Police can measure instantaneous speed using a radar gun or speed camera

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

Which formula can be used to find instantaneous speed?

A

v (isnt) = d (length of vehicle) / t (takes to pass)

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

What are vectors and scalars?

A

A vector represents direction and magnitude

A scalar represents just magnitude

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

How are vector quantities portrayed?

A

The unit symbol is in bold, but when handwriting put an arrow over the units

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

Name some vectors

A 
Velocity
Force
Displacement
Acceleration
Weight
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Name some scalars

A 
Speed
Distance
Mass
Time 
Energy
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is the difference between distance and displacement?

A

Distance is the total distance travelled, whereas displacement is the distance from the start point to the end point in a straight line

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

Distance and Displacement

E.g A man travels 4km East, then 2km South and then 4km West (draw diagram)

What distance has the man travelled?
What is the displacement of the man?

A

d = 4km + 2km + 4km
= 10km

s = 2km SOUTH / 2km on a bearing of 180•

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

What is the difference between velocity and speed?

A

Speed is only a scalar, whereas velocity is a vector, which means when using velocity magnitude AND direction have to be used

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

What is the velocity equation?

A

s = vt

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

How do you work out the direction for velocity?

A

It will be the same as the displacements direction

E.g. Using trigonometry/ scale diagram

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

What is the definition of acceleration?

A

Acceleration is the rate at which an object changes its velocity

17
Q

What is the acceleration formula?

A

a = v - u / t

OR

a = delta v / t

18
Q

Why does a graph about acceleration level out as the track gets higher?

A

It reaches a maximum velocity

19
Q

What will a velocity / time graph look like when it is describing:

Acceleration?
Deceleration?
Constant speed?

A

Acceleration = the line sloping up

Deceleration = the line sloping down

Constant speed = the line is horizontal

20
Q

What does the gradient of the line represent?

A

The gradient of the line is equal to the acceleration

21
Q

What is the gradient formula?

A

m = vertical / horizontal

22
Q

How do you work out the displacement of an object using a velocity / time graph?

A

The area under the graph is equal to the displacement

Nat 5 Physics - Unit 1 (3 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions