Topic 1 - Motion

Question 1

Runner A finishes a race in less time than runner B. Who’s faster?

Answer 1

Runner A

Question 2

What two measurements are needed to calculate speed?

Answer 2

Distance and time

Question 3

What is the SI unit for speed?

Answer 3

m/s

Question 4

What does acceleration mean?

Answer 4

A change in velocity

Question 5

How do we represent forces on diagrams?

Answer 5

Arrows, with length depending on size of force

Question 6

What does mass mean?

Answer 6

Amount of matter inside an object

Question 7

What is the unit for mass?

Answer 7

Kg

Question 8

What does a vector have that a scalar does not?

Answer 8

Direction

Question 9

Name a scalar and a vector measured in metres

Answer 9

Distance, displacement

Question 10

Name a scalar and a vector measured in m/s

Answer 10

Speed, velocity

Question 11

Name a vector with units of newtons

Answer 11

Force or weight

Question 12

Is mass a vector or scalar

Answer 12

Scalar

Question 13

Is energy a vector or scalar

Answer 13

Scalar

Question 14

Why is acceleration a vector?

Answer 14

It is measuring a change in another vector

Question 15

What is the equation for calculating speed?

Answer 15

Speed = distance / time

Question 16

What is the average speed

Answer 16

Total distance / time for the whole journey

Question 17

What is the equation for calculating distance?

Answer 17

Distance = speed x time

Question 18

How is a constant speed shown on a distance/time graph?

Answer 18

Straight, sloping line

Question 19

What does a horizontal line on a distance/time graph show?

Answer 19

Stationary object

Question 20

What is the speed of sound in still air?

Answer 20

330m/s

Question 21

How can you calculate velocity from a distance time graph?

Answer 21

Gradient of line

Question 22

Unit for acceleration?

Answer 22

m/s/s

Question 23

What is u?

Answer 23

Initial velocity

Question 24

What is v?

Answer 24

Final velocity

Question 25

How to calculate acceleration?

Answer 25

Velocity / time / time

Question 26

What is the acceleration due to gravity?

Answer 26

10 m/s

Question 27

What is the force of gravity?

Answer 27

10 newtons

Question 28

What is the force that pulls us to earth?

Answer 28

Gravity

Question 29

What is ‘drag’ also called?

Answer 29

Air/water resistance

Question 30

What are balanced forces?

Answer 30

Equal sized forces acting in opposite directions

Question 31

What do you call the force produced by an engine?

Answer 31

Thrust

Question 32

What word describes both the speed and direction of movement of an object?

Answer 32

Velocity

Question 33

What is the name for a single force on an object with the same effect as all the forces combined?

Answer 33

Resultant

Question 34

How do we describe the forces on an object when the force in one direction is bigger than the other?

Answer 34

Unbalanced

Question 35

How to calculate 2 forces in the same direction?

Answer 35

Add

Question 36

Calculate 2 forces in opposite directions

Answer 36

Find the range

Question 37

What does the length of an arrow on a force diagram represent?

Answer 37

Size of force

Question 38

Thrust = 2000N Drag = 1800N What is the resultant?

Answer 38

200N forwards

Question 39

How do balanced forces on an object affect it’s velocity?

Answer 39

It’s velocity stays the same

Question 40

What is the name for the force that makes an object move in a circular path?

Answer 40

Centripetal

Question 41

What provides the centripetal force for a car going round a roundabout?

Answer 41

Friction

Question 42

What are the forces on an orbiting moon?

Answer 42

Gravity acting towards the planet

Question 43

In what direction does the centripetal force act?

Answer 43

Towards the centre of the circle

Question 44

Why is the force of gravity greater on a lorry than a car?

Answer 44

Greater mass

Question 45

Why is the resultant force accelerating a car usually less than the force provided by it’s engine?

Answer 45

Air resistance/friction

Question 46

Formula for force

Answer 46

F = m x a

Question 47

An object is moving at a constant velocity, what can be said about forces acting on it?

Answer 47

Balanced

Question 48

Where is friction applied in a car?

Answer 48

Brakes/tyres

Question 49

Why is wet road more slippery than a dry one?

Answer 49

Water acts as a lubricant

Question 50

Negative deceleration?

Answer 50

Slowing down

Question 51

Drinking alcohol effects? | Being tired?

Answer 51

Increased reaction time

Question 52

Braking distance?

Answer 52

The distance a car travels while slowing down

Question 53

Thinking distance?

Answer 53

Distance between driver recognising danger and applying the brakes

Question 54

How speed affects thinking distance

Answer 54

Greater speed, greater thinking distance

Question 55

What is the equation for momentum?

Answer 55

Mass x velocity

Question 56

What is meant by ‘momentum is conserved’?

Answer 56

Total momentum before = total momentum after