AP EAMCET202120 Aug 2021Evening ShiftPhysicsMotion in One DimensionActual
Two paper screens A and B are separated by 150 m . A bullet pierces A and then B. The hole in B is 15 cm below the hole in A. If the bullet is traveling horizontally at the time of hitting A, then the velocity of the bullet at A is: g = 10 m s - 2
Options
- A100 3     m   s - 1
- B200 3   m   s - 1
- C300 3   m   s - 1
- D500 3   m   s - 1
Correct answer
D. 500 3   m   s - 1
Step-by-step solution
The bullet exhibits horizontal projectile motion. Displacement of bullet in vertical direction, y = 15   cm = 0 . 15   m Displacement of bullet in horizontal direction, x = 150   m The equation of trajectory, y = g x 2 2 u 2 ⇒ 0 . 15 = 10 × 150 2 2 u 2 ⇒ 2 u 2 = 10 × 150 2 0 . 15 ⇒ u = 500 3   ms - 1