Problems : Gravitation

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Problems Gravitation
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• The gravitational force of attraction between the
  earth and the sun is 1.6 x 10 exp23 N. What
  would this force have been if the earth had been
  twice as massive?

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2. The gravitational force of attraction between
the earth and sun in 1.6 x 10 exp23 N. What
would be this gravitational force if the earth
had formed twice as far away from the sun?
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• 3. Mr. Ben Dover, whose mass is 60.0 kg, is doing
  a physics demonstration in front of the
  classroom. A) How much gravitational force does
  he exert on 55.0kg Martha in the front row, 1.5 m
  away?b) How does this compare to what he exerts
  on 65.0kg Lester 4.00 m away in the back row?

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• 4. Whitney is standing in the lunch line 6.38 x
  10exp6 m from the center of the earth. The
  earths mass is 5.98 x 10exp24 kg. A) What is
  the acceleration due to gravity? B) When Whitney
  eats her lunch and her mas is increased, does
  this change the acceleration due to gravity?

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• 5. The earth has a mass of 5.98 x 10exp24 kg and
  a radius of 6.38 x 10exp6 km. What is the escape
  speed of a rocket launched on the earth?