# P10&11 | Motion,Momentum &Pressure Key facts Test |(Triple GCSE & Higher ) AQA

Hi! These are key facts on Acceleration and Momentum & Pressure. GCSE AQA which you can use to test yourself. Higher tier questions are marked, so you can skip them if you need to. Please do note this was adapted to aid my revision, but I hope these questions can help you too :)

Resources I used to make these cards are from the Oxford AQA revision guide and @Freesciencelessons on youtube:

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What is the equation for resultant force acting on an object?
Force(N) = mass (kg) x acceleration (m/s^2)
1 of 30
What is the equation for acceleration?
Acceleration (m/s^2) = change in velocity (m/s) ÷ time(s)
2 of 30
(Higher) What is the inertia of an object?
The object's tendency to stay at rest or in uniform motion (at a constant speed in a straight line)
3 of 30
What is terminal velocity?
When an object stops accelerating and moves at a constant velocity
4 of 30
What is braking distance?
The distance travelled by car under the braking force
5 of 30
What is the thinking distance?
The thinking distance plus the braking distance
6 of 30
What is the stopping distance?
The distance travelled by an object (car) during the (driver's) reaction time and distance travelled under braking force
7 of 30
(Higher) What is the momentum if an object is not moving?
Momentum = 0
8 of 30
(Higher) Equation for Momentum?
Momentum (kg m/s) = mass (kg) x velocity (m/s)
9 of 30
(Higher) What happens to momentum in a Closed System?
The total momentum before an event is equal to the total momentum after an event (net momentum is 0)
10 of 30
(Higher) What happens in a collision or explosion?
Momentum is conserved, because no external forces are acting on the object
11 of 30
(Higher) Is momentum a Scalar or Vector quantity?
Vector, as it has both size and direction.
12 of 30
(Higher) Mass multilplied by change in velocity is also equal to what?
Momentum
13 of 30
(Higher) What happens When two objects 'recoil' after an 'explosion/crash'
The momentum of the two objects are equal and opposite
14 of 30
(Higher) Why might the momentum still be the same even if 2 objects recoil at different speeds?
The different masses make the objects move at different speeds, but the momentum is still equal and opposite
15 of 30
(Higher) What is the equation for the impact force an object exerts in a collision?
force = (mass x change in velocity)÷time. | force = change in momentum ÷ time
16 of 30
(Higher) How are cars designed to reduce the impact force?
They have seatbelts, airbags and crumple zones, side impact bars which all help reduce impact force
17 of 30
(Higher) How can police uses momentum to find details of a car crash?
Momentum is conserved, so using the masses of the cars, and with data for breaking distances, they can calculate the speed of a car before a collision
18 of 30
What is Hookes's law?
Force = spring constant x extension
19 of 30
What are fluids?
Liquids and gasses
20 of 30
What is the equation for pressure?
Force normal to surface (N) ÷ area of that surface (m^2)
21 of 30
1 pascal is equal to...
1 Newton acting on 1m^2 area
22 of 30
(Higher) What happens to the pressure as depth of water increases?
The pressure increases
23 of 30
(Higher) What is upthrust?
The force(of the water) acting upwards on the bottom of an object
24 of 30
(Higher) What does an object need in order for it to float?
Upthrust must be equal to the object's weight
25 of 30
(Higher) Size of upthrust acting on an object is same as ______ of water _________ by the object
Size of upthrust acting on an object is same as WEIGHT of water DISPLACED by the object
26 of 30
(Higher) What happens when the objects weight is 1) higher than upthrust 2) same as upthrust 3) lower than upthrust?
1) object sinks 2)the object floats, the surface of the object is at the surface of the water 3) The object floats, above the surface
27 of 30
(Higher) What is atmospheric pressure?
Is due to air molecules within the earths atmosphere colliding with the surface
28 of 30
(Higher) What happens as the altitude gets higher?
The weight of the air is less, there are fewer air molecules, so lower the pressure.
29 of 30
(Higher) What happens when a flat object experiences 2 different pressures on either side?
Flat objects with a different pressure on either side will experience a force because of the pressure difference
30 of 30

## Other cards in this set

### Card 2

#### Front

What is the equation for acceleration?

#### Back

Acceleration (m/s^2) = change in velocity (m/s) ÷ time(s)

### Card 3

#### Front

(Higher) What is the inertia of an object?

### Card 4

#### Front

What is terminal velocity?

### Card 5

#### Front

What is braking distance?