pphysics Flashcards
(25 cards)
What is the equation for work done?
Force x distance
What is the equation for weight?
Mass x gravitational acceleration
Equation for power?
Work done/ time taken
Equation for speed?
Distance/time
Equation for distance?
Speed x time
Equation for acceleration
Velocity/ time
What is a scaler
Scalers have a magnitude but no sense of direction.
What is a vector?
Vectors have a sense of direction and a magnitude.
Give an example of a scaler.
Mass
Give an example of a vector
Displacement
Name two contact forces
Up thrust, air resistance
Name to non contact forces
Gravity, Magnetism
What is Newtons first law?
Inertia
Give 2 safety features in cars
airbag & seatbelt
how do safety features prevent injury
increase time for the change of momentum
What is Newton’s second law?
force = mass x acceleration
What is the conservation of momentum?
momentum before = momentum after
When would a car be traveling at a constant speed but still be accelerating
when it is going in a circle
What is Newton’s third law?
for every action there is an equal and opposite force.
Name 2 things that can effect a person’s thinking distance.
intoxication & drugs
give 2 things that effect someones breaking distance
broken brakes & vehicle being damaged
what is stopping distance
the distance covered by a vehicle in order for it to become stationary
what is thinking distance
the distance covered between seeing something and reacting
what is braking distance
the distance covered before a vehicle becomes stationary
