Question

Need help!!
1. Determine the angular velocity of the hour hand of a clock in radians per second. (two significant figures please).

Answer 1

@Mertsj

Answer 2

\[\frac{2\pi}{12 hr}\times \frac{1 hr}{3600 \sec}=1.5 radians/\sec\]

Answer 3

@Mertsj can you plz explain me how you get that values plz

Answer 4

Let me check. Maybe I hit a wrong button.

Answer 5

ok

Answer 6

Whoops. 1.5 x10^-4

Answer 7

oh ok but can you plz explain how you get 2pie/ 12 hrs and etc.

Answer 8

I am confuse

Answer 9

If the hour hand is on 1 where will it be in 12 hours?

Answer 10

on 1 again

Answer 11

because 12+1 is 13

Answer 12

Yes. It will have moved all the way around the circle (2pi radians) back to its starting point in 12 hours.The rest is just unit conversion.

Answer 13

ok but I still don't get 3600 how you get that

Answer 14

How many seconds are in 1 hour where you live?

Answer 15

60 sec

Answer 16

In America there are 60 seconds in 1 minute

Answer 17

so it be in 1 hour there is like 60min and 1 min is 60 sec. So it be 60X60 which is 3600

Answer 18

right?

Answer 19

Bingo!!! Good for you!!!

Answer 20

thanks

Answer 21

yw