3.1 Motion

Question 1

What is the definition of speed?

Answer 1

The rate of change of distance.

Question 2

What is the definition of displacement?

Answer 2

A change in position in a particular direction.

Question 3

What is the definition of distance?

Answer 3

How far an object has travelled.

Question 4

What is the equation for speed?

Answer 4

Speed = distance/time (s=d/t)

Question 5

What is the definition of velocity?

Answer 5

The rate of change of displacement.

Question 6

What is the equation for velocity?

Answer 6

Velocity = displacement / time (v=d/t)

Question 7

What is the equation for acceleration?

Answer 7

Acceleration = change in velocity / change in time (a=Δv/Δt).

Question 8

What is the first suvat equation?

Answer 8

v=u+at

Question 9

What is the second suvat equation?

Answer 9

s=½(u+v)t

Question 10

What is the third suvat equation?

Answer 10

s=ut+½at²

Question 11

What is the fourth suvat equation?

Answer 11

v²=u²+2as

Question 12

How is stopping distance calculated?

Answer 12

Stopping distance = thinking distance + braking distance.

Question 13

How is thinking distance calculated?

Answer 13

Thinking distance = speed x reaction time.

Question 14

How is braking distance calculated?

Answer 14

Velocity squared / acceleration.

Question 15

What is thinking distance proportional to?

Answer 15

Speed.

Question 16

What is braking distance proportional to?

Answer 16

Speed squared.

Question 17

What does a displacement-time graph show?

Answer 17

How the displacement of a moving object varies with time.

Question 18

What is the gradient of a displacement time graph equal to?

Answer 18

The instantaneous velocity of the moving object.

Question 19

What does the area beneath a velocity time graph represent?

Answer 19

The change of the displacement.