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Concepts Of Physics MCQ Edition [Volume 1]PhysicsRest and Motion Kinematics

Two projectiles A and B are launched with an angle of projection of 15^ for projectile A and 45^ for projectile B . If R_A and R_B denote the horizontal ranges for the two projectiles, then

Options

  1. AR_A > R_B
  2. Bthe information is insufficient to determine the relation between R_A and R_B
  3. CR_A = R_B
  4. DR_A < R_B

Correct answer

B. the information is insufficient to determine the relation between R_A and R_B

Step-by-step solution

The horizontal range of a projectile is given by R = u^2 (2 ) g . For projectile A , _A = 15^ , so R_A = u_A^2 (30^ ) g = u_A^2 2g . For projectile B , _B = 45^ , so R_B = u_B^2 (90^ ) g = u_B^2 g . Since the initial velocities u_A and u_B are not provided in the question, the ranges cannot be compared. Therefore, the information is insufficient to determine the relation between R_A and R_B .

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