The minute hand of a wall clock is 14 cm long. In the time interval from 6 PM to 6 : 30 PM, the tip of the minute hand has: (A) average velocity = 0.56 m/hr (B) average speed = 0.88 m/hr = 0.88 m/hr) (C) average acceleration = 3.52 m/hr D) travelled distance = 0.44 m

average velocity = total displacement /total time

total displacement = 2L = 28cm =0.28m

total time = 30mins = 30/60 hr = 0.5hr

average velocity = 0.28/0.5 = 0.56km/hr                                ansA

average speed = total distance/total time

total distance = piL = 0.4396m

total time = 30mins = 0.5hr

average speed = 0.4396/0.5 = 0.88m/hr                               ansB

distance travelled = piR = 3.14*14 = 43.99cm=.44m              ansD