1.

The ratio of angular speed of a second- hand to the hour-hand of a watch is

Answer»

`72: 1`
`3600: 1`
`60: 1`
`720: 1`

Solution :`omega= (theta)/(t) rArr omega alpha (1)/(t)`
HENCE `(omega_(sec))/(omega_("hour"))= (t_("hour"))/(t_(sec))= (12 xx 3600s)/(60S)= 720 THEREFORE omega_(sec): omega_("hour") = 720: 1`


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