P2 - Motion Flashcards
What is displacement?
Distance in a given direction
What is the formula for velocity?
V = s / t Velocity = Displacement / Time
What is acceleration?
Rate of change in velocity in m/s^2
What is the formula for calculating acceleration?
a = (v - u) / t Acceleration = (final velocity - initial velocity) / time
How does acceleration happen in terms of forces?
Forward force must be greater than the force in the opposite direction
How do you calculate weight?
W = mg Weight = mass * force of gravity
What is the unit of weight?
Newtons
What is the formula for calculating speed?
S = d / t Speed = distance / time
What is the difference between a scalar and a vector?
A vector is a magnitude in a given direction
A scalar is a magnitude in any direction
What does a straight line sloping upwards in a velocity / time graph mean?
Constant acceleration
In a velocity / time graph, what is a horizontal line?
Constant velocity
How do you calculate acceleration from a velocity / time graph?
Divide change in velocity by change in time to find the acceleration by using a gradient right-angle triangle
What is the difference between speed and velocity?
Speed is how fast you travel in any direction (scalar)
Velocity is how fast you travel in a given direction (vector)
