4.a) A body describes a circumference of radius 2m and the motion is uniform. It does 2 rotations in 6s. If
π
2
= 9.86, find the centripetal acceleration.
b) The wheel of an engine of 4m diameter does 90 rotations per minute.
Calculate: i) the linear speed.
ii) the angular speed.
iii) the centripetal acceleration.
c) Differentiate tangential acceleration from centripetal acceleration