Two bullets are fired simultaneously, horizontally and with a different speed from the same place. Which bullet will hit the ground first?
Correct answer: D. Both will reach simultaneously
- A. The faster one
- B. Depends on their mass
- C. The slower one
- D. Both will reach simultaneously
Explanation
Given, u1>u2 In both cases, the downward acceleration and the initial vertical velocities are the same, they will take the same time to hit the ground. As we know, h=uyt+0.5gt2 (Applying in the vertical direction) h=0+0.5gt2 t=√2h/g The time of flight does not depend on the horizontal velocity. Hence both will reach simultaneously.
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About Force and Motion
Displacement, velocity and acceleration describe motion, including the horizontal and vertical components of projectile motion. The chapter connects these quantities with Newton's laws, momentum and impulse, then applies conservation of momentum to collisions, distinguishing elastic collisions from inelastic ones.
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