he length of a minute hand of a clockis 7 cm. Find out the average spe

1.	he length of a minute hand of a clockis 7 cm. Find out the average speed and average velocity(incm/min) of the tip of the minute hand when it movesduring a time interval from 3: 15 pm to 3: 45 pm?
Answer» Answer: The DISTANCE MOVED by TIP of minutes hand when it moves during a time interval from 3 p.m. to 3.45 p.m. is rθ where, R = length of minute hand θ = angle moved by minutes hand ⇒ Distance COVERED =4× 2 3π =6πcm ⇒distance=6πcm=0.06πm ⇒velocity= time distance ⇒velocity= 45×60 0.06π =69.7×10 −5 ms −1

he length of a minute hand of a clockis 7 cm. Find out the average speed and average velocity(incm/min) of the tip of the minute hand when it movesduring a time interval from 3: 15 pm to 3: 45 pm?

Answer»

Answer:

The DISTANCE MOVED by TIP of minutes hand when it moves during a time interval from 3 p.m. to 3.45 p.m. is rθ

where, R = length of minute hand

θ = angle moved by minutes hand

⇒ Distance COVERED =4×

3π

=6πcm

⇒distance=6πcm=0.06πm

⇒velocity=

time

distance

⇒velocity=

45×60

0.06π

=69.7×10

−5

−1