Question
Wired Faculty
Sponsor Area
Sponsor Area
A body of mass m = 10–2 kg is moving in a medium and experiences a frictional force F = –kv2. Its initial speed is v0 = 10 ms–1. If, after 10 s, its energy is 1/8 mv02,the value of k will be
10-4 kg m-1
10–1 kg m–1 s–1
10-3 kg m-1
10-3 kg s-1
A.
10-4 kg m-1
A slender uniform rod of mass M and length
C.
The variation of acceleration due to gravity g with distance d from centre of the earth is best represented by (R = Earth's radius)
B.
A particle A of mass m and initial velocity v collides with a particle B of mass m/2 which is at rest. The collision is head on, and elastic. The ratio of the de-Broglie wavelengths λA to λB after the collision is
D.
Sponsor Area
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