Question

What will be the appreciate average speed of the hour hand of a click.if its length is 100 mm

Answer 1

Answer:

To complete one second the arm of second moves360

∘

Angular speed is

60

2π

Hour hand completes 1 rotation 360

∘

in

12hrs

Angular speed is

12×3600

2π

Therefore the ratio of angular velocity is given as

60

2π

=

12×3600

2π

Hence the ratio of the angular speed of hour and seconds is1:720

Answer 2

Answer:

Time taken by the hour hand to complete one rotation of 360

o

is 12 hours i.e.43200 seconds

Thus its angular velocity w=

43200

360

We get w=

120

1

degree per second