(P1) Topic 2- Motion And Forces Flashcards
What is an energy store
Energy something can have
What is an energy transfer
Moving energy around
What is an energy resource
A way of getting energy
What does a distance-time graph show
How far things move in a certain time
What does a velocity time graph show
How fast an object moves (acceleration, deceleration)
What is Newton’s first law
Objects will remain at constant velocity unless acted upon by a resultant force
What is Newton’s second law
Force = mass x acceleration
What is Newton’s third law
Every action has an equal and opposite reaction
What is momentum measured in
Kilogram metres per second (kgm/s)
What is inertia
The ability of an object to resist change of motion
Equation for momentum
Momentum = mass x velocity
Is momentum a scalar or vector
A vector
What is a vector
Something with magnitude and direction
What is a scalar
Something with magnitude but not direction
What is stopping distance
How far you go whilst trying to stop
Equation for stoping distance
Stopping distance = thinking distance + braking distance
Equation for distance fallen
Distance fallen = 1/2 x acceleration due to gravity x reaction time squared
What is the value for acceleration due to gravity
10
Equation for reaction time
Reaction time = square root (2 x distance / 10)
Equation for kinetic energy
Kinetic energy = 1/2 x mass x velocity squared
Equation for force
Force = change in momentum / time
