Question

a table clock has its minute hand 4 cm long find the average velocity of the tip of the minute hand

a) between 6:00 am to 6:30 am

b) between 6 am to 6:30 pm

.

pl zexplian with each step

Answer 1

Displacement = 8cm, from 4cm above the centre at 6:00 AM to 4 cm below the centre at 6:30 PM.
8cm = 0.08m

Time taken by displacement takes 12.5 hours = 45,000 seconds.

Mean velocity = displacement / time
Mean velocity = 0.08 / 45000 = 1.777... × 10^-6 m/s

1.7778 × 10^-6 m/s
Similarly the other one! :)