P2 - Forces Flashcards
Why do objects speed up or slow down?
Because of unbalanced forces
Which force causes weight?
Gravity
What happens when forces are balanced?
An object stays still OR continues to move at a steady speed
What type of energy is stored in stretched springs?
Elastic potential energy
What’s the point of proportionality for a spring?
The point after which the string is stretched so much that it won’t return to it’s original shape
Which force causes an object to slow down?
Friction/drag
Which factors make up stopping distance?
Thinking distance and braking distance
Which factors affect thinking distance?
Speed, alcohol, drugs and tiredness
Which factors affect braking distance?
Speed, mass of car, brake and tyre quality, weather conditions
What’s the conservation of moment?
Amount of moment before collision = amount of momentum after collision
