Question

The velocity of projection of a body is increased by 2%.
Other factors remaining unchanged, what will be the
percentage change in the maximum height attained?
(a) 1% (b) 2 %
(c) 4 % (d) 8 %

Answer 1

Answer:

correct option is c

Explanation:

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• Height of projectile is given by,

$h = \frac{ {u}^{2} {sin}^{2}x }{2g}$

hence,

$h \alpha {u}^{2}$

and % error in height,h

(∆h/h)=2×(∆u/u)

=2×2

=4%

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