Unit 1 - Motion

Question 1

What is weight?

Answer 1

A force that acts towards the centre of the Earth

Question 2

What do all forces have?

Answer 2

A magnitude and a direction

Question 3

What are forces measured in?

Answer 3

Newton’s (N)

Question 4

What are vector quantities

Answer 4

Quantities that have both a direction and size

Question 5

What type of quantities are forces

Answer 5

Vector

Question 6

What are scalar quantities

Answer 6

Quantities that don’t have a direction

Question 7

Giv e5 examples of scalar quantities

Answer 7

Mass, speed, energy, distance and time

Question 8

What is the displacement

Answer 8

The distance covered in a straight line and has a direction

Question 9

What is the velocity

Answer 9

The speed in a particular direction

Question 10

What is acceleration

Answer 10

A measure of how fast the velocity is changing

Question 11

What does the speed of an object tell you?

Answer 11

How quickly is travels in a certain distance.

Question 12

What is the instantaneous speed?

Answer 12

The speed at a particular point in a journey

Question 13

What is the word equation for the average speed

Answer 13

Average speed = distance/time

Question 14

What is the symbol for distance?

Answer 14

X

Question 15

What can be used to make the results of the speed of a fast moving object more accurate

Answer 15

A light gate

Question 16

What is the typical speed for walking

Answer 16

1.4m/s

Question 17

What is the typical speed for a train

Answer 17

55 m/s

Question 18

What can a distance/time graph represent

Answer 18

A journey

Question 19

How can the speed be calculated using a distance/time graph

Answer 19

Calculating the gradient (rise over run)

Question 20

What does a straight sloping line show in a distance/time graph?

Answer 20

The object is traveling at a constant speed

Question 21

What type of quantity is acceleration?

Answer 21

Vector

Question 22

Why are the units of acceleration metres per second per second?

Answer 22

Because acceleration tells you the change in velocity in each second.

Question 23

What are the units for acceleration

Answer 23

m/s^2

Question 24

What does an acceleration of 10 m/s^2 mean

Answer 24

That each second, the velocity increases by 10m/s

Question 25

What is the word equation for acceleration

Answer 25

Acceleration= change in velocity/ time taken

Question 26

What is the symbol equation for acceleration

Answer 26

a = v - u / t

Question 27

What do v and u stand for

Answer 27

``` v = final velocity u = initial velocity ```

Question 28

What is deceleration

Answer 28

When the acceleration is a negative value meaning that it slows down.

Question 29

What is the symbol equation relating acceleration, distance, starting and final velocity

Answer 29

v^2 - u^2 = 2 x a x X

Question 30

What is the value of acceleration due o gravity?

Answer 30

10m/s^2

Question 31

How do you find the acceleration of an object using a velocity/time graph

Answer 31

Calculating the gradient

Question 32

What does the velocity time graph show when the line goes below the axis?

Answer 32

The object is moving in the opposite direction.

Question 33

How do you work out the distance that an object has travelled using a velocity time graph?

Answer 33

Calculating the area beneath the line