$Assertion$ : In a free fall, weight of a body becomes effectively zero.
$Reason$ : Acceleration due to gravity acting on a body having free fall is zero.
$Reason$ : Acceleration due to gravity acting on a body having free fall is zero.
- [AIIMS 2014]
- AIf both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
- BIf both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
- CIf both the Assertion and Reason are incorrect.
- DIf the Assertion is correct but Reason is incorrect.
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Adjoining figure shows a force of $40\, N$ acting at $30^o$ to the horizontal on a body of mass $5 \,kg$ resting on a smooth horizontal surface. Assuming that the acceleration of free-fall is $10\, ms^{-2}$, which of the following statements is (are) correct?
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Adjoining figure shows a force of $40\, N$ acting at $30^o$ to the horizontal on a body of mass $5 \,kg$ resting on a smooth horizontal surface. Assuming that the acceleration of free-fall is $10\, ms^{-2}$, which of the following statements is (are) correct?
$[1]$ The horizontal force acting on the body is $20\, N$
$[2]$ The weight of the $5\, kg$ mass acts vertically downwards
$[3]$ The net vertical force acting on the body is $30\, N$