Speed, Distance & Acceleration

Question 1

example of a scalar quantity?

Answer 1

speed

Question 2

example of a vector quantity

Answer 2

velocity

Question 3

what does a straight diagonal line represent on a DISTANCE-TIME graph?

Answer 3

constant speed

Question 4

what does a straight diagonal line represent on a DISTANCE-TIME graph?

Answer 4

constant speed

Question 5

what does a straight horizontal line represent on a DISTANCE-TIME graph?

Answer 5

a stationary object

Question 6

what does a straight diagonal line represent on a SPEED-TIME graph?

Answer 6

constant acceleration

Question 7

overall stopping distance =

Answer 7

thinking distance + braking distance

Question 8

factors that affect thinking distance

Answer 8

tiredness, use of mobile phones, influence of alcohol/drugs and speed of car.

Question 9

factors that affect the braking distance

Answer 9

condition of tyres/brake pads, wet/icy weather conditions, road surface, steepness of road and speed of car.

Question 10

what are the 2 main rules for a velocity time graph?

Answer 10

1. The slope/gradient is equal to the acceleration
2. The are under the graph is equal to the distance travelled

Question 11

how to calculate speed at a given time from a distance-time graph?

Answer 11

• draw a tangent at the required time
• calculate the gradient

Question 12

how to calculate the distance traveled from a velocity-time graph

Answer 12

it is equal to the area underneath the graph

Question 13

how does the speed of a vehicle affect thinking and braking distance

Answer 13

both are increased

Question 14

what can affect a drivers reaction time

Answer 14

-drugs
-alcohol
-tiredness

Question 15

what can effect braking distance

Answer 15

-icy roads
-wet roads
-lack of tire grip
-poor break conditions

Question 16

What is the difference between a scalar and a vector

Answer 16

Vectors have magnitude and direction, scalars only have magnitude