Answer:
(i)
(a) Gravitational force action on the 50 kg
mass on the earth = mg = 50 x 9.8 = 490 N.
(1/2)
(b) Gravitational force acting on the 50 kg mass due to
Jupiter
(1/2)
(c) Gravitational force acting on the 50 kg mass due to
Saturn
Total gravitational force
due to the Jupiter and the saturn
(1/2)
Thus, the combined force due to the planets Jupiter and
Saturn N is negligible as compared to
gravitational force due to the earth.
(ii) We know that, g at equator is less than g at poles (Antartica).
Thus, weight at equator is less than weight at
pole (Antartica).
A bag of sugar weights W at a certain place on
the equator. If this bag is taken to Antartica, it
will weigh more due to greater value of g.(1)
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