Inside a horizontally moving box, an experimenter finds that when… - Vidyadip

MCQ

Inside a horizontally moving box, an experimenter finds that when an object is placed on a smooth horizontal table and is released, it moves with an acceleration of $10\,m / s ^2$. In this box if $1\,kg$ body is suspended with a light string, the tension in the string in equilibrium position (w.r.t. experimenter) will be$.........\,N$ (Take $g =10\,m / s ^2$ )

A
$10$
✓
$10 \sqrt{2}$
C
$20$
D
$0$

✓

Answer

Correct option: B.

$10 \sqrt{2}$

b
(b)

Acceleration of box $=10\,m / s ^2$Inside the box forces acting on bob are shown in the figure.

$T =\sqrt{( mg )^2+( ma )^2}=10 \sqrt{2}\,N$

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