Motion Flashcards
What is the unit for speed?
m/s
What is the unit for distance?
m
What is the unit for time?
s
What is the unit for acceleration?
m/s^2
What is the unit for force?
N
What is the unit for mass?
kg
What is the unit for gravitational field strength?
m/s^2
Define average speed.
Distance travelled / time taken
Define instantaneous speed.
The speed an object travels at a given moment in time.
Define acceleration.
The rate of change of velocity.
Define velocity.
The rate of change of position.
Define Newton’s First Law.
When the net force on an object is zero
Define Newton’s Second Law.
F = ma, The net force is equal to the mass multiplied by the acceleration
Define Newton’s Third Law.
For every force, there is a paired force that is equal but opposite in direction.
What is given by the gradient of a distance-time graph?
Velocity
What is given by the area beneath a distance-time graph?
Nothing!
What is given by the area beneath a velocity-time graph?
Distance travelled
What is given by the gradient of a velocity-time graph?
Acceleration
What does a flat line mean on a distance-time graph?
Stationary
What does a flat line mean on a velocity-time graph?
Constant speed
What is the equation that links average speed, distance and time
AVERAGE speed = distance / time
What is the equation for calculating the acceleration of an object (in the case where the acceleration is constant)?
a = (v - u) /t
What does v stand for (in the acceleration equation)?
Final speed
What does u stand for (in the acceleration equation)?
Initial speed
