An object is projected from ground with speed 20 ,m / s at angle … - Vidyadip

MCQ

An object is projected from ground with speed $20 \,m / s$ at angle $30^{\circ}$ with horizontal. Its centripetal acceleration one second after the projection is .......... $m / s ^2$ [Take $g=10 \,m / s ^2$ ]

✓
$10$
B
$0$
C
$5$
D
$12$

✓

Answer

Correct option: A.

$10$

a
(a)

$T =\frac{2u \sin \theta}{g}$

$=\frac{2 \times 20 \times 1 / 2}{10}=2 \sec$

$t=1$ partical at highest point

$a_c=g=10 m / s ^2$

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