A stone is thrown from a bridge at an angle of 30o with the horizontal in the downward direction with a speed of 25m/s. If the stone strikes the water after 2.5 sec, then calculate the height of the bridge from the water surface (g=9.8m/s2)
Correct answer: A. 61.9 m
- A. 61.9 m
- B. 35 m
- C. 70 m
- D. None
Explanation
Correct option is A The correct solution is given as: As this is numerical thus it can only have one answer.
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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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