Topic 1: Distance, Speed and Acceleration

Question 1

What is distance?

Answer 1

How far the object travels or how far away the object is from a fixed point.

Question 2

What is distance measured in?

Answer 2

Metres (m)

Question 3

What is time

Answer 3

The interval between two events or the time since the start of the motion.

Question 4

what is time measured in?

Answer 4

Seconds (s)

Question 5

What is speed?

Answer 5

A measure of how fast or how slow the object is moving.

Question 6

What is speed measured in?

Answer 6

metres per second
m/s
miles per hour
mph

Question 7

What is the equation to calculate speed?

Answer 7

speed=distance/time

Question 8

What is velocity?

Answer 8

A measure of how fast or how slow the object is moving in a given direction.

Question 9

What is velocity measured in?

Answer 9

m/s in a given direction.

Question 10

What is a scalar quantity?

Answer 10

A physical quantity that is completely described by its magnitude.

Question 11

What is a vector?

Answer 11

A physical quantity described by both its magnitude and direction.

Question 12

Is speed a scalar quantity or a vector?

Answer 12

Scalar quantity.

Question 13

Is velocity a scalar quantity or vector?

Answer 13

Vector.

Question 14

What is acceleration/deceleration?

Answer 14

The rate of change of velocity.

Question 15

What is acceleration/deceleration measured in?

Answer 15

m/s²

Question 16

What is the equation for calculating acceleration/deceleration?

Answer 16

acceleration or deceleration = change in velocity/time

Question 17

What do distance-time graph allow us to measure?

Answer 17

The speed of a moving object.

Question 18

How are stationary objects represented in a distance-time graph?

Answer 18

Straight horizontal lines.

Question 19

What is the slope/gradient of a distance-time graph?

Answer 19

The speed of the object.

Question 20

How do you calculate distance travelled? (for a velocity-time graph)

Answer 20

The area under the velocity-time graph.

Question 21

What is thinking distance?

Answer 21

The distance the vehicle travels while the driver sees the hazard, thinks about braking and then actually reacts n braking.

Question 22

What is braking distance?

Answer 22

The distance that the vehicle moves while the brakes are being applied and the vehicle is decelerating to 0m/s.

Question 23

How do you calculate total stopping distance?

Answer 23

total stopping distance=thinking distance+braking distance

Question 24

What factors affect thinking distance? (3)

Answer 24

• The velocity of the car
• The reaction time of the driver - can be affected by tiredness, use of alcohol
• The driver may be distracted

Question 25

What factors affect braking distance? (6)

Answer 25

• Velocity of the car
• Mass of the car
• Condition of the brakes
• Condition of the tyres
• Condition of the road surface
• The weather

Question 26

What are 3 safety systems built into modern cars?

Answer 26

• Seat belts
• Air bags
• Crumple zones

Question 27

What is the first way of reducing the force on the occupants?

Answer 27

By reducing the speed of the collision and so reducing the change of the momentum.

Question 28

What is the second way of reducing the force on the occupants?

Answer 28

By increasing the time for the collision.

Question 29

What are 2 traffic control measures?

Answer 29

• Speed limits

* Speed bumps

Question 30

What is displacement?

Answer 30

Distance in a certain direction. (Basically velocity distance).