What is the acceleration of a cyclist who starts from rest and speeds up uniformly to 15 m/s in 4.0 seconds? _

Answer 1

Use the kinematic equation

v = v_o + at

where v is the final velocity, vo is the initial velocity, a is the acceleration and t is the time.

In this problem,

v_o = 0, the cyclist starts from rest,

v = 15 m/s

t = 4.0s

a = v/t

a = 15 m/s / 4.0 s

a = 3.75 m/s²