Question

the seconds hand of the clock is 14 cm long the average speed of the tip of the seconds hand in 15 seconds is?​

Answer 1

Answer:

Answer :

A::B::C

Explanation:

In 15 s, it will rotate 90∘90∘ or 14th14th circle .

∴∴ Average speed =Total distancetotal time=dtTotal distancetotal time=dt

=2πR/415=πR30=π(2.0)30=2πR/415=πR30=π(2.0)30

=(π15)cm/s=(π15)cm/s

Average speed =Total distancetotal time=stTotal distancetotal time=st

=2–√Rt=2–√(2.0)15=22–√15cm/s