4.1 Scalars & Vectors Flashcards

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

What is a scalar quantity?

A

only has a magnitude

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

What is a vector quantity?

A

has direction and magnitude

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

What is distance

A
  • scalar quantity
  • describes how far an object has travelled overall
  • doesn’t take into account the direction it has travelled in
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is displacement

A
  • vector quantity
  • describes how far an object is from where it started and in what direction
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What are the 5 most common vector quantities?

A
  • displacement
  • velocity
  • acceleration
  • force
  • momentum
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

How are vectors represented?

A
  • by an arrow indicating the direction of the vector
  • the length of the arrow represents the magnitude
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

How can vectors be combined

A

by adding them to produce the resultant vector

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

What is a resolving vector

A

opposite of adding vectors

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

What does it mean for a single resultant vector to be resolved?

A

it can be represented by 2 vectors which in combination have the same effect as the original one

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

How are resolving vectors used on an inclined plane

A
  • component forces are parallel or perpendicular to the slope
  • the weight of the object is vertically downwards
  • the norms or reaction for is vertically up from the object
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

How can the Weight vector be split up?

A
  • Wcos(θ)is perpendicular to the slope
  • Wsin(θ) parallel to the slope
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

When does the object move down the slope?

A
  • if there is no friction the force parallel to the slope causes the object to move down the slop
  • if the object is not moving perpendicular to the slope, the normal force R = Wcosθ
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What are coplanar forces?

A

forces acting on the same plane

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

How are coplanar forces represented?

A

by vector traingles

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

When are forces in equilibrium?

A
  • at rest
  • moving at a constant velocity
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

How are coplanar forces represented when in equilibrium

A

by a closed vector triangle
- the vector, when joined together, forma closed path

17
Q
A