Linear Motion Flashcards
What is a vector quantity ?
Measurements in terms of magnitude and direction
What is a scalar quantity ?
Measurements in terms of magnitude only
What is Mass (S) ?
Physical quantity expressing the amount of matter or substance in a body
Kg
What is Weight (V) ?
The force exerted by gravity on a mass
Mass (Kg) x Gravity (9.8) = Weight (N)
What is Distance (S) ?
The length of the path a body takes as it moves from stat to finish
m
What is Displacement (V) ?
The shortest route in a straight line between start and finish
m
What is Speed (S) ?
The rate of change of distance
m/s
What is Velocity (V) ?
The rate of change of displacement
m/s
What is Acceleration (V) ?
The rate of change of velocity
Change in velocity (m/s) / Time (s) = Acceleration (m/s²)
What is Momentum (V) ?
The product of mass and velocity
Mass (kg) x Velocity (m/s) = Momentum (kgm/s)
What is Frictional Force ?
Occurs when two or more bodies are in contact, opposes motion
Static Friction
Sliding Friction
What factors affect friction ?
Surface characteristics
Mass of the objects
Temperature of the two surfaces
What is Air resistance ?
Acts in the opposite direction to the motion of a body travelling through air
What does air resistance depend on ?
Velocity
Cross-sectional area
Shape and surface characteristics
What is impulse ?
The time it takes a force to be applied
Force (N) x Time (s) = Impulse (Newton Seconds)
