1. CP2 – Forces & Motion (p145-155)
Velocity-time graph
QUESTIONS
Q1) how do you calculate speed?
Q2) What is happening at each stage on the graph
Q3) What is the acceleration during stage A?
Q4) What was the total distance travelled during this journey?
Define the following:
Vector =
Velocity =
Speed =
Acceleration =
Displacement =
Newton’s First Law
1.) How could you describe the forces acting on this vehicle?
2.) Calculate the resultant force.
3.) If the forces were equal what will happen to the motion of the object?
Newton’s Third Law
What is Newton’s third law as a simple definition?
State the action-reaction pairs for someone sat on a chair
How does Newton’s third law allow rockets to fly?
Newton’s Second Law –
Using F = ma complete the table a b c d e
Force (Newtons, N)
200
840
5000
Mass (kilograms, kg) 20
7.0
0.40
Acceleration
(meters/second squared, m/s2)
0.80
5.0
6.0
0.20
Calculating momentum
Momentum is a measure of the tendency of an object to …………….. moving. Momentum of an object depends upon its ………………… and …………………………
It can be calculated using the equation: ____ = ______ x _____
The unit for momentum is __________
Stopping Distance
Write a list of all the factors that would effect thinking and breaking distances
Thinking distance
Breaking distance
Mass and Weight
What is the difference between mass and weight?
What is the equation for weight?
If Sam with a mass of 54kg went to the moon, where gravity is about 1.6N/Kg, what would his weight be?

2. CP2 – Forces & Motion (p145-155)
Velocity-time graph
QUESTIONS
Q1) speed = distance ÷ time
Q2) A = accelerating; B = constant speed; C = accelerating; D = decelerating
Q3) 12/3 = 4m/s2
Q4) 102.5m
Define the following:
Vector = a quantity having direction as well as magnitude
Velocity = the speed of an object in a given direction
Speed = the distance covered in a specific time
Acceleration = rate of change in velocity over a period of time
Displacement = the distance an object has travelled in a straight line
Newton’s First Law
1.) unbalanced
2.) 1500N
3.) continue at a constant speed, or remain stationary if it was not already in motion
Newton’s Third Law
For every action there is an equal and opposite reaction
The force exerted by the person on the chair; the force exerted by the chair on the person
The action of ejected gases pushed from rocket causes an equal and opposite reaction force pushing the rocket forwards
Newton’s Second Law –
Using F = ma complete the table a b c d e
Force (Newtons, N) 16
200
840
2.4
5000
Mass (kilograms, kg) 20 40
7.0
0.4
25000
Acceleration
(meters/second squared, m/s2)
0.80
5.0
120
6.0
0.20
Calculating momentum
Momentum is a measure of the tendency of an object to stop moving. Momentum of an object depends upon its mass and velocity
It can be calculated using the equation: P = m x v
The unit for momentum is kg m/s
Stopping Distance
Write a list of all the factors that would effect thinking and breaking distances
Thinking distance
Braking distance
caffeine
Wear of brakes/tyres
Tiredness
Mass of the car (luggage + passengers
Alcohol
Road surface
Drugs
Weather
Mass and Weight
Mass is the amount of matter in an object; weight is dependent on gravity acting on mass
W = m x g
86.4N