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NEET UG PHYSICS MCQ: MOTION IN PLANE

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Understanding +4 | -1

A ball is projected with velocity

{v_0}

at an angle of elevation

{30^0}

. Mark the correct statement

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Correct option: C

Horizontal component of momentum will be conserved

Option C (Horizontal component of momentum will be conserved) is correct because in projectile motion, the horizontal component of velocity remains constant (if air resistance is negligible), and thus the horizontal component of momentum is conserved.

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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