Question

1) Find the ratio of angular speeds of minute hand hour hand of a watch also find the angular speed of the second hand.
2) A wheel is subjected to uniform angular acceleration about its axis. Initially its angular velocity is zero. Inthe first 2 seconds, it rotates through an angle ?. In the next 2 seconds it rotates through an angle $. find the ratio ?/$.

Answer 1

ANGULAR SPEED OF HOUR HAND=2PIE/720 AS IT COMPLETES ONE REVOLUTION IN 720 MINUTES.
ANGULAR SPEED OF MINUTE HAND=2PIE/60 AS IT COMPLETES ONE REVOLUTION IN 60 MINUTES.
THEREFORE THE RATIO WILL BE= MINUTE HAND = 2PIE/60 = 12:1
HOUR HAND 2PIE/720