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Vikas TU Grade: 12th Pass
        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
6 years ago

Answers : (1)

vikas askiitian expert
510 Points
										

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


 


 

6 years ago
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