Physics Best

Question 1

What is the difference between speed and velocity

Answer 1

Velocity is speed in a given direction

Question 2

What does the gradient of a distance time graph tell you

Answer 2

Speed

Question 3

What do flat horizontal sections on a distance time graph represent

Answer 3

Where it is stationary

Question 4

What do straight uphill or downhill sections on a distance time graph represent

Answer 4

Steady speed

Question 5

On a distance time graph the steeper the gradient…..

Answer 5

The faster the speed

Question 6

What do curved represent on a distance time graph

Answer 6

Acceleration or deceleration

Question 7

What does a steepening curve represent on a distance time graph

Answer 7

Speeding up

Question 8

What does a levelling off curve represent on a distance time graph

Answer 8

Slowing down

Question 9

What is acceleration

Answer 9

How quickly velocity in changing

Question 10

What can a change in velocity be

Answer 10

Change in speed or change in direction

Question 11

What does the gradient of a velocity time graph represent

Answer 11

Acceleration

Question 12

Why a do flat sections on a velocity time graph represent

Answer 12

Steady speed

Question 13

The steeper the velocity time graph….

Answer 13

The greater the acceleration or deceleration

Question 14

What does the area under a velocity time graph represent

Answer 14

The distance traveled in that time interval

Question 15

What does a curve mean on a velocity time graph

Answer 15

Changing acceleration

Question 16

How is velocity found on a velocity time graph

Answer 16

Reading off the velocity axis

Question 17

What 2 effects does gravity have

Answer 17

Makes things accelerate towards the ground, 10m/s2 on earth

Gives everything a weight

Question 18

What is mass

Answer 18

The amount of matter in an object

Question 19

What is weight caused by

Answer 19

The pull of the gravitational force towards the earth center

Question 20

An object has the …… Mass on earth as on the moon but it’s weight will be …….

Answer 20

Same

Different

Question 21

Will a 1kg mass weigh more or less on the moon than on earth?

Answer 21

Weigh less (1.6N) on the moon than on earth (10N)

Question 22

Why will a mass weigh less on the moon than on the earth

Answer 22

Less of a gravitational force pulling it

Question 23

What is weight measured in

Answer 23

Newtons

Question 24

Is weight a force

Answer 24

Yes

Question 25

What is weight measured with

Answer 25

Newton meter

Question 26

Is mass a force

Answer 26

No

Question 27

What is mass measured with and what units

Answer 27

Kg with a mass balance

Question 28

What is GFS is on earth

Answer 28

10 N/Kg

Question 29

What is GFS on the moon

Answer 29

1.6N/Kg

Question 30

What will the overall effect of the forces on an object decide about the motion

Answer 30

Where there it will accelerate, decelerate or sty at a steady speed

Question 31

What is the resultant force

Answer 31

Single force that has the same effect as all forces acting on the object

Question 32

What direction does gravity act

Answer 32

Downwards

Question 33

If there is a resultant force what will happen to the object

Answer 33

Change its state of rest or motion; causes a change in velocity

Question 34

What is a reaction force

Answer 34

Force opposing gravity so the forces balance, without this force it would accelerate

Question 35

What will happen if the resultant force of an stationary object is 0

Answer 35

It will stay stationary

Question 36

If there isn't a resultant force acting on a moving object what will happen to its motion

Answer 36

Keep on moving at the same velocity then all the forces on it must be balanced

Question 37

If there is a non zero resultant force what happens to the motion of the one jet

Answer 37

It will accelerate in the direction of the force

Question 38

What 5 forms the acceleration of a non zero resultant force take

Answer 38

``` Start Stop Speed up Slow down Change direction ```

Question 39

Why is 'if something is moving there must be an overall resultant force acting on it'?

Answer 39

If there is an overall resultant force it will accelerate, you get a steady speed if the resultant force is zero

Question 40

When to forces interact what are the forces they exert on each other like

Answer 40

Equal and opposite

Question 41

What are speed and velocity both measured in

Answer 41

M/s