Acar moving south speeds up from 10 m/s to 40 m/s in 15 seconds. what is the car's acceleration?
o 2 m/s
o 15 m/s
o 30 m/s
050 m/s

Explanation:

Assuming the car is moving only in one direction (to the South), its acceleration is given by the following formula, which expresses the variation of the velocity in time:

  (1)

Where:

  is the variation in velocity

is the variation in time

Rewritting (1) with the calculated values:

  (2)

 This is the acceleration of the car

wavelength variability is the right one