to help kim practice for special olympics, aally runs beside him for half the required distance. she runs the remaining distance at her regular speed and arrives 90 secs ahead of kim. what is the ratio of sallys regular speed to kims speed? T= kims total time.

options -

a) T/90;

b)T/(T-90);

c)T/(T-180);

d)T/180;

moment of inertia of a equilateral triangle about an axis passing through centre and perppendicular to the plane

. Because of the rotation of the earth, a plumb bob may not hang exactly along the direction of
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The length of a massless rod is measured using vernier callipers having 10 vernier scale divisions and least count of 0.1 mm. Two masses 1.00 ± 0.01 kg and 4.00 ± 0.02 kg are attached to its ends. If reading of vernier scale is 5 divisions coinciding with 1.3 cm, what is the % error in locating centre of mass from lighter mass

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The phase of particle at t is 70°and another particle is at t is 790° what is wavelength if the distance between two particles is1 m