CP2-Forces And Motion Flashcards
What is a scalar quantity?
It has a magnitude but no direction
What is a vector quantity?
It has a magnitude and direction
Is displacement a scalar or vector?
Vector
Is distance a scalar or vector?
Scalar
Is velocity a scalar or vector?
Vector
Is speed a scalar or vector?
Scalar
Is acceleration a scalar or vector?
Vector
Is force a scalar or vector?
Vector
Is weight a scalar or vector?
Vector
Is mass a scalar or vector?
Scalar
Is momentum a scalar or vector?
Vector
Is energy a scalar or vector?
Scalar
What is velocity?
Speed in a stated direction
What is the equation for distance?
Speedxtime
What is the equation for acceleration?
Change in velocity/total time taken
What is Newton’s first law?
A body will remain at rest or continue in a straight line at a constant speed as long as the forces acting on it are balanced
What is Newton’s second law?
When a resultant force acts on a mass then there will be a change in its velocity. The resultant force determines the size and direction of the subsequent acceleration of the mass
What is weight?
The force a body experiences due to its mass and size of the gravitational field it is in (Earth in 10N/Kg)
How is weight measured?
Weight is a vector and is measured in Newton’s using a Newton meter
What is the equation for weight?
Mass x gravitational field strength
What is mass?
A measure of the amount of matter that is contained within a 3D space. It is not affected by the size of the gravitational field strength it is in
How is mass measured?
Mass is a scalar and is measured in Kg
What is Newton’s 3rd law?
For every action is an equal and opposite reaction
What is circular motion?
A body will move in a circular path if it’s motion is at right angles to a force that acts inwards along the radius of the path
What is centripetal force?
A force which acts on a body moving in a circular path and is detected towards the centre around which the body is moving
What is the typical human reaction time?
0.20-0.25 Seconds
What are the 5 factors that influence Human reaction times?
Tiredness, distractions, alcohol, drugs, age
What is thinking distance?
The distance the car travels while the driver reacts to the danger and applies the brakes
What is braking distance?
The distance the car travels while it is slowing down once the brakes have been applied
What are factors that influence braking distance?
Friction between the tyres and road decreases when the road is icy or wet, the brakes and/or tyres are worn, the mass of the car is big
What is stopping distance?
Thinking distance+braking distance
