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NEET UG PHYSICS MCQ: MOTION IN PLANE

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A man is swimming with speed 10 km/h in still water crosses a river of width 1 km along the shortest path in 10 minutes. The velocity of river flow is

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Correct option: D

8 km/h

Option A (6 km/h) is correct because the boat's velocity relative to the ground is found using the Pythagorean theorem, and then the river's velocity is calculated.

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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}

\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}

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

A

B

are the magnitudes of

\overrightarrow{\mathrm{A}}

\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