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NEET2014PhysicsMotion in Two DimensionsActual

A projectile is fired from the surface of the earth with a velocity of 5   m   s - 1 and angle θ with the horizontal. Another projectile fired from another planet with a velocity of 3   m   s - 1 at the same angle follows a trajectory which is identical with the trajectory of the projectile fired from the earth. The value of the acceleration due to gravity on the planet is: (given = 9.8 &#160

Options

  1. A3.5
  2. B5.9
  3. C16.3
  4. D110.8

Correct answer

A. 3.5

Step-by-step solution

The Equation of the Trajectory of a Projectile y = x tan θ - g x 2 2 u 2 cos θ y ,x are Variable and θ is constant so g u 2 = c o n s tan t g 5 2 = a 3 2 a = 9.8 × 9 25 a = 3.5

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