Question
question 5
how to prove the answer?
3) Two objects, with maseesm and are distancer part. The gravitational force between them i F. The masses re changed to 2m1 and 2m2. and the detance changed to 4r, What is the magnitude of the new gravitational force? B F/16 AJ 16F d) compared toits mass on the Earth, the mass of an obyect on the Moonis B) half as much. C) less. 5) suppose a satellite were orbiting the Earth just above the urface. What is its coleration? B) larger than g smaller than g D)Impossible to say without knowing the mass. 60 The acceleration of gravity on the Moon is one-sixth what it is on The radius o the Moonis 6) ane-fourth that the Earth. Whatis Moon's mass compared to the D) 1/96 C0116 B) 1/24 A)1/16 7) Two planets have the same gravity, but Planet Bhas twice the radius of planetA. lfplanet 7) A has mass m, what is the mass of planet B)0707m A)1.41m hit Tidiinnahgat a spherical planet Emas M. 80
Explanation / Answer
5] For a satellite to remain in a stable orbit of a fixed radius, the centripetal force due to the revolution should be equal to the gravitational force.
=> mg = mv2/r = ac
therefore, ac = g.
