Motion is detected when an object changes its position with respect to a reference point. Coordinate system is basically used to represent motion. A coordinate system uses numbers or coordinates which represent position of the reference points on a two-dimensional or three-dimensional space. The trajectory of a point or line can be studied on a coordinate system which describes various aspects of motion like velocity, acceleration, distance, displacement etc. Coordinate system is important because it helps to choose a starting point and the direction (which will be positive).
Pretty fast. Everything looks fast when running past a light pole
Wave speed = (wavelength) x (frequency)
Wave speed = (3 m) x (15 Hz)
<em>Wave speed = 45 m/s</em>
Apply Newton's second law of motion to the car:
F = ma
F is the driving force moving the car, m is the car's mass, and a is the car's acceleration.
Assuming we apply the same F to another more massive car, it would move with a smaller acceleration.
