The rectilinear motion of a particle is defined by the relation x = 2t3 - 3t2 + 10t - 5. Calculate the acceleration when time (t) = 3 seconds, considering that the value of 'x' is measured in meters.

A 5 kg mass at rest on a frictionless table is acted upon by a constant force of 12 N. The distance travelled by it in 2 s is:

A bus starts to move from rest and acquires a velocity of 30 m/s in 10 seconds. Calculate its acceleration.