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Gravitation · Question 61

AIPMT 2000MCQEasy📈 Topic in 25% papers+4−1
1

For a planet having mass equal to mass of the earth but radius is one fourth of radius of the earth. Then escape velocity for this planet will be

  1. 11.2 km/s
  2. 22.4 km/s
  3. 5.6 km/s
  4. 44.8 km/s

Answer

(2) 22.4 km/s

Solution

ve = 2GMR ve 1 R (same M)

vpve = RR/4 = 2

vp = 2 11.2 = 22.4 km/s

Answer: (2)

AIPMT 2000

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2

A body of weight 72 N moves from the surface of earth at a height half of the radius of earth, then gravitational force exerted on it will be

  1. 36 N
  2. 32 N
  3. 144 N
  4. 50 N
AIPMT 2000

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