Vector and Scalars

Question 1

What is a vector quantity ? give an example

Answer 1

A quantity that has both direction and magnitude - forces

Question 2

What is a scalar quantity? Give an example

Answer 2

A quantity that has only magnitude (mass, volume)

Question 3

What are drawn to show the vector quantity?

Answer 3

Arrows

Question 4

What does the size of the arrow represent?

Answer 4

The size of the force

Question 5

What does direction of the arrow represent?

Answer 5

Direction of the force

Question 6

What is distance and is it S or V?

Answer 6

Distance: scalar, total length traveled

Question 7

What is displacement and is it S or V?

Answer 7

Displacement: vector, shortest length between the start and end points + a direction
distance travelled in a given direction

Question 8

Speed =

Answer 8

speed (m/s) = distance (m) / time (s)

Question 9

What does a distance time graph plot?

Answer 9

The distance an object travels against the time it takes to do so

Question 10

What does gradient tell you on a DT graph?

Answer 10

the speed, steeper = faster

Question 11

Average speed on a DT graph?

Answer 11

total distance / total time

Question 12

Increasing velocity =

Answer 12

acceleration

Question 13

decreasing velocity =

Answer 13

deceleration

Question 14

acceleration =?

Answer 14

acceleration (m/(s*s)) = change in velocity (m/s) / time (s)

a = (v - u)/t

Question 15

A velocity time graph shows?

Answer 15

How velocity changes as time goes by

Question 16

On a VT graph, a flat line =?

Answer 16

constant speed

Question 17

On a VT graph, the gradient of the line shows?

Answer 17

acceleration

Question 18

gradient =?

Answer 18

change in y/ change in x

Question 19

How to calculate distance on a VT graph?

Answer 19

multiply constant speed by low long it was constant for

Question 20

(vv) - (uu) =

Answer 20

(v*v) - (u*u) = 2as
v = final velocity (m/s)
u = initial velocity (m/s)
a = acceleration (m/(s*s))
d = distance/displacement (m)

Question 21

What is velocity?

Answer 21

speed in a given direction

Question 22

For arrows in 2 opposite directions?

Answer 22

subtract the forces, direction is that of the larger force

Question 23

For 2 arrows in the same direction?

Answer 23

Add the forces, direction remains the same

Question 24

For 2 arrows 90 apart?

Answer 24

Use pythag - direction = angle formed