NEET UG PHYSICS MCQ: MOTION IN PLANE

1 Medium

1 of 1

Understanding +4 | -1

Assertion: A man can cross river of width

d

in minimum time. On increasing the river velocity, minimum time to cross the river by man will remain unchanged.
Reason: As velocity of a river is perpendicular to its width so time to cross the river is independent of velocity of river.

View answer and explanation

Correct option: A

If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion

Option A is correct because the minimum time to cross a river depends only on the swimmer's speed and the river's width, not the river's velocity.

More Questions from MOTION IN PLANE

Practice All Chapter MCQs →

Acceleration due to gravity: The magnitudes of the two vectors

\mathrm{\vec a}\,and\,\mathrm{\vec b}

are a and b respectively. The vector product of

\mathrm{\vec a}\,and\,\mathrm{\vec b}

cannot be If

\overrightarrow P \,\,.\,\,\overrightarrow Q = 0\,and\,\overrightarrow P \,\, \times \,\,\overrightarrow Q = 0

, then the angle between

\overrightarrow Q \,and\,\overrightarrow R

is What happens, when we multiply a vector by -2 ? Which of the following is not true? If

\vec{A}=3 \hat{i}+4 \hat{j}

and

\vec{B}=6 \hat{i}+8 \hat{j}

where

A

and

B

are the magnitudes of

\overrightarrow{\mathrm{A}}

and

\overrightarrow{\mathrm{B}}

The wind appears to blow from the north to a man moving in the north-east direction. When he doubles his velocity the wind appears to move in the direction

{\cot ^{ - 1}}\left( 2 \right)

east of north. The actual direction of the wind is