A table clock has its minutte hand 4.0 cm long. Find the average velocity of the tip of the minute hand a. between 6.00 a.m. to 6.30 a.m. and b. between 6.00 a.m. to 6.30 p.m.

Explanation

from
`AB=h=x tan theta`
Let bullet collide to target after time t
`{:("then y-coordinate of target",,y_(T)=x tan theta -1/2 g t^(2)...(1)),("and y-coordinate of bullet",,y_(b)=u sin theta xt-1/2 g t^(2)...(2)),("But if",,y_(T)=y_(b)),("then",,x tan theta-1/2g t^(2)=u sin theta xt-1/2 g t^(2)...(3)),("x-coordinate of bullet",,x_(b)=x=ucos thetat),(,,t=x/(u cos theta)" ""placeing in equation (3)"),(,,x tan theta -1/2 g t^(2)=x tan theta-1/2 g t^(2)):}` L.H.S.=R.H.S.
So bullet ccollide with target.