Question

A car moving at an initial velocity of 20 meters/second accelerates at the rate of 1.5 meters/second2 for 4 seconds. The car’s final velocity is __meters/second.

Answer 1

The initial velocity: v o = 20 m/s.And :  a = 1.5 m / s² , t = 5 s.The final velocity formula:v = v o + a · tv = 20 + 1.5 · 5v = 20 + 7.5v = 27.5 m /sAnswer: The car`s final velocity is 27.5 meters / second.

Answer 2

v = v0 + at

= 20 + 1.5 × 4 m/s

= 20 + 6 m/s

=

26 m/s.