A body starts moving from rest on a smooth horizontal surface. The acceleration, a, of the body is given by the equation ( t - 1) m/s2 , where t is the time elapsed in seconds from the start. Determine its average velocity at t = 5 s.
a) v = 7.50 m / s
Since the acceleration
is a function of time, the velocity is given by,
The displacement from
the initial position is given by,
At t = 5 s the displacement
is given by,.
The average velocity
is given by
Hence the average velocity is 1.67 m/s.