Questions
A shell fired from the ground is just able to cross in a horizontal direction the top of a wall 90 m away and 45 m high. The velocity of the shell will be:
detailed solution
Correct option is B
45 = H = u2sin24502×10 ⇒ 45 = u2.122×10u2 = 45 ×20×2 = 90 × 20 ⇒ u = 302Talk to our academic expert!
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A ball is projected obliquely with a velocity 49 ms–1 strikes the ground at a distance of 245 m from the point of projection. It remained in air for
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