Science - Physics

Question 1

How do you calculate speed?

Answer 1

Speed=Distance/Time

Question 2

What are the units for speed?

Answer 2

Metres per second (m/s)

Question 3

How do you calculate distance?

Answer 3

Speed x time (s x t)

Question 4

How do you calculate time?

Answer 4

Distance ÷ speed (d/s)

Question 5

What axis does the distance go on a distance-time graph?

Answer 5

Y-axis

Question 6

What axis does the time go on a distance-time graph?

Answer 6

X-axis

Question 7

What does a straight diagonal line mean of a distance-time graph?

Answer 7

That an object is moving at a steady pace.

Question 8

What does an upward curved line mean on a distance-time graph?

Answer 8

Acceleration

Question 9

What does a downward curved line mean on a distance-time graph?

Answer 9

Deceleration

Question 10

What do we call it when an objects speed increases?

Answer 10

Acceleration

Question 11

What do we measure acceleration in?

Answer 11

m/s²

Question 12

What does it mean if a line is straight and horizontal on a speed-time graph?

Answer 12

The object is at a constant speed.

Question 13

What does it mean if it is a upward diagonal straight line of a speed-time graph?

Answer 13

The object is accelerating

Question 14

What does it mean if it is a downward diagonal straight line of a speed-time graph?

Answer 14

The object is decelerating

Question 15

What do we measure deceleration in?

Answer 15

m/s², like acceleration

Question 16

How do we find the distance on a speed-time graph?

Answer 16

We can calculate the distance by working out the are under the graph. The distance is measured in metres (m).

Question 17

What is a scalar quantity and give an example?

Answer 17

Scalar quantities have a size (or magnitude) only.

e.g. the speed of the car was 60km/h

Question 18

What is a vector quantity and give an example?

Answer 18

Vector quantities have both size (or magnitude) and direction, but also in a straight line.
e.g. The boat sailed 30km North

Question 19

How do we draw a vector quantity?

Answer 19

As an arrow

Question 20

What s the displacement of an object?

Answer 20

How far an object has moved from its starting point an din what direction.

Question 21

What is velocity?

Answer 21

The speed/how fast and object is, what direction it travels in a straight line.

Question 22

What is acceleration?

Answer 22

When an object increases velocity.

Question 23

How do we calculate acceleration?

Answer 23

Final velocity - initial velocity
Acceleration = —————————-
Time

Question 24

The principle of moments states that for an object to be in equilibrium…

Answer 24

The sum of all the clockwise moments about a point = the sum of all the anticlockwise moments about a point

Question 25

What is pressure?

Answer 25

Pressure is how much something is pushing on something else.

Question 26

What is needed for pressure to occur?

Answer 26

Force and surface area

Question 27

What is pressure measured in?

Answer 27

Newtons per cm² (N/cm ² ) or newtons per m² (N/m ² )

Question 28

How can pressure be increased and decreased?

Answer 28

1. We change the size of the surface area

2. We change the amount of force used.

Question 29

What is the formula triangle formula for pressure?

Answer 29

F
——
P x A