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Gravitation

AIPMT 2003MCQEasy📈 Topic in 38% papers+4−1
Ques. 1AIPMT 2003

The acceleration due to gravity on the planet A is 9 times the acceleration due to gravity on planet B. A man jumps to a height of 2 m on the surface of A. What is the height of jump by the same person on the planet B?

  1. (2/9) m
  2. 18 m
  3. 6 m
  4. (2/3) m

Answer

(2) 18 m

Solution

The man takes off with the same speed u on both planets, and the maximum height is h = u22g, so h 1g.

hBhA = gAgB = 9

hB = 9 2 = 18 m

Answer: (2)

Keep practising — Gravitation

Ques. 2AIPMT 2003

A body of mass m is placed on earth's surface which is taken from earth surface to a height of h = 3R, then change in gravitational potential energy is

  1. mgR4
  2. 23mgR
  3. 34mgR
  4. mgR2
Ques. 3AIPMT 2001

With what velocity should a particle be projected so that its height becomes equal to radius of earth?

  1. ( GMR )1/2
  2. ( 8GMR )1/2
  3. ( 2GMR )1/2
  4. ( 4GMR )1/2
Ques. 4AIPMT 2000

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
Ques. 5AIPMT 2000

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

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