Wednesday

April 23, 2014

April 23, 2014

Posted by **Karen** on Saturday, April 5, 2008 at 3:24am.

--------------------------------------------------------------------------------

(a) What is the period Tsecond of the motion of the second hand? (_) The period is 10 seconds.

(o) The period is 60 seconds.

(_) The period is 30 seconds.

(_) The period depends on the value for the length L.

(_) The period is 1 second.

Correct. The period is the time it takes for the second hand to make one complete revolution.

(b) What is the period Tminute of the motion of the minute hand? (_) The period is 600 seconds.

(o) The period is 3600 seconds.

(_) The period is 60 seconds.

(_) The period depends on the value for the length L.

(_) The period is 1800 seconds.

Correct. The period is the time it takes for the minute hand to make one complete revolution.

(c) What is the algebraic expression for the ratio ac,second/ac,minute of the centripetal accelerations for the tips of the second hand and the minute hand? Express your answer in terms of the periods Tsecond and Tminute. (Answer using T_m to be the period of the second hand and T_s to be period of the minute hand.)

ac,second/ac,minute =

not sure what algebraic expression means

(d) What is the ratio ac,second/ac,minute of the centripetal accelerations for the tips of the second hand and the minute hand?

ac,second/ac,minute = I'm thinking the ratio would be T_m/T_s. I sthis correct?

I was able to answer the multiple question part of the problem, but not sure what it is asking me to do about the algebraic expression and ratio

- Physics -
**drwls**, Saturday, April 5, 2008 at 9:47amc) An agebraic expression is a formula. In this case it is

a = V^2/R = (2 pi R/T)^2/R

or

a = 4 pi^2 R/T^2

Where R is the length of the clcok's hand.

(4) The are asking for an algebraic expression for the ratio

(ac,second)/(ac,minute)

Assuming the lengths R of the two hands are the same, that would be

= (T_m/T_s)^2

because the acceleration is inversely proportional to T^2

**Related Questions**

physics (centripetal acceleration) - The second hand and the minute hand on one...

Physics - What is the algebraic expression for the ratio ac,second/ac,minute of ...

Physics - What is the algebraic expression for the ratio ac,second/ac,minute of...

Physics - What is the algebraic expression for the ratio ac,second/ac,minute of ...

physics - When it is 10:00, the hour hand on an analog clock is 300 degrees ...

Physics- Mechanics - The speed of the tip of the minute hand on a town clock is ...

physics - At 15 minutes past the hour, a 50 g mouse runs up a grandfather clock ...

physics - At 15 minutes past the hour, a 50 g mouse runs up a grandfather clock ...

physics? - The minute hand of a bedside clock is 2.5 cm long. In order for the ...

PreCalc - Consider the tip of each hand of a clock. Find the linear velocity in ...