Introduction to Motion
Motion is the change in position of an object with respect to its surroundings in a given interval of time.
Scalars vs Vectors
- Scalar Quantity: Has only magnitude (e.g., Distance, Speed).
- Vector Quantity: Has both magnitude and direction (e.g., Displacement, Velocity).
Concept Check:
If you move 3m East and then 4m North, what is your distance and displacement?
Distance: 3 + 4 = 7m
Displacement: √(3² + 4²) = 5m (Pythagoras Theorem)
Equations of Motion
For uniform acceleration 'a', initial velocity 'u', final velocity 'v', time 't', and displacement 's':
v = u + ats = ut + ½at²2as = v² - u²