Question

sound propagates by creating successive compression and rarefaction zones in gaseous medium on a hot summer day it is measured the minimum distance between one such maximum compression zones maximum rarefied zones is 1.6 m velocity is 340m/s. Wave is prpagating east to west max distance travelled by medium particle from east to west is 0.8m find 1. frequency
2. wavelength
3. amplitude ​

Answer 1

B

A ball is hanging vertically by a light inextensible string of length L from fixed

point O. The ball of mass m is given a speed u at the lowest position such

that it completes a vertical circle with centre at O as shown. Let AB be a

diameter of circular path of ball making an angle with vertical as shown.

(g is acceleration due to gravity)

8.

Let TA and To be tension in string when ball is at A and B respectively, then TA-Tg is equal to

(A) 6 mg cose

(B) 6 mg

(C) 12 mg cose

(D) None of these

9.

Let āx and äg be acceleration of ball when it is at A and B respectively, then 12a +ag is equal to

(A) 2g sine

(B) g 12 cos? 0+4 (C) 4g cose

(D) None of these

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