Motion Flashcards
What are the 2 types of quantities in physics?
Vector and scalar
What are the 2 quantities in a scalar?
Magnitude and unit
What are the 3 quantities in a vector
Magnitude unit and direction
What are the units for distance and speed?
M and m/s
What are the units for displacement and velocity?
M and m/s
What is the unit for acceleration?
M/s Squared
What is the equation for speed?
S = d / t
What is the equation for average speed if you have the initial and final speeds?
S = (u + v) / 2
What is the equation for rate of change of speed?
Δ S = (v - u) / t
What is the equation for velocity?
V = Displacement / t
What is the equation for velocity if you have the initial and final velocity?
V = (u + v) / 2
What is the equation for acceleration?
A = Δ V / t. Δ V = (final - initial)
What does the gradient represent on a distance time graph?
Speed
What does the gradient of a speed time graph represent?
Δ S. rate of change of speed
What does the area under a speed time graph represent?
Distance travelled
What does the gradient of a displacement time graph represent?
Velocity
What does the gradient of a velocity time graph represent?
Acceleration
What does the area under a velocity time graph represent?
Displacement
When an objects velocity is increasing then the object is said to be:
Accelerating
When an objects velocity is decreasing, then the object is said to be:
Decelerating. Also called Retardation
If a distance time graphs gradient is zero what is happening to the object?
Speed = 0. At rest
If a speed time graphs gradient is zero what is happening to the object?
Δ S = 0. Moving with a constant speed
If a displacement time graphs gradient is zero what is happening to the object?
Velocity = 0. At rest
If a velocity time graphs gradient is zero what is happening to the object?
Acceleration = 0. Moving with a constant ( positive ) velocity
How would you get a negative acceleration?
When your final speed is less than your initial speed this is due to the equation being ( V - U )
