First slide

Projection Under uniform Acceleration

Question

A stone is projected horizontally with a velocity 9.8 ms^–1 from a tower of height 100 m. Its velocity one second after projection is

Moderate

A

9.8 ms^-1
B

4.9 ms^-1
C

9.8√2 ms^-1
D

4.9√2 ms^-1

Solution

$V = \sqrt {{{(u)}^2} + {{(gt)}^2}} = \sqrt {{{(9.8)}^2} + {{(9.8)}^2}} = 9.8\sqrt 2 m{s^{ - 1}}$

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