Kinematics Question 692

Question: A stone is projected from the ground with velocity 25m/s . Two seconds later, it just clears a wall 5 m high. The angle of projection of the stone is (g=10m/sec2)

Options:

A) 30o

B) 45o

C) 50.2o

D) 60o

Show Answer

Answer:

Correct Answer: A

Solution:

[a] For vertical upward motion h=ut12gt2

5=(25sinθ)×212×10×(2)2

25=50sinθsinθ=12θ=30



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