What should be the velocity of earth due to rotation about its own axis so that the weight at equator become 3/5 of initial value. Radius of earth on equator is 6400 km
(a) 7.4 × 10-4 rad /sec (b) 6.7 × 10-4 rad /sec
(c) 7.8 × 10-4 rad /sec (d) 8.7 10-4 rad /sec
Answer: c
(41)
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a (123)