Question

Two particles A and B move with constant velocities

\overrightarrow {{v_1}} \,\,\mathrm{and}\,\,\overrightarrow {{v_2}}

. At the initial moment their position vectors

\overrightarrow {{r_1}} \,\,\mathrm{and}\,\,\overrightarrow {{r_2}}

respectively. The condition for particles A and B for their collision is:

Accepted Answer

$\frac{{\overrightarrow {{r_1}} \, - \,\overrightarrow {{r_2}} \,\,}}{{\left| {\overrightarrow {{r_1}} \, - \,\overrightarrow {{r_2}} } \right|}}\, = \,\frac{{{{\vec v}_2} - {{\vec v}_1}}}{{\left| {{{\vec v}_2} - {{\vec v}_1}} \right|}}\,$

Answer

$\overrightarrow {{r_1}} \, 	imes \,\overrightarrow {{v_1}} \,\, = \,\,\overrightarrow {{r_2}} \, 	imes \,\,\overrightarrow {{v_2}} $

Answer

$\overrightarrow {{r_1}} \,.\,\overrightarrow {{v_1}} \,\, = \,\,\overrightarrow {{r_2}} \,.\,\,\overrightarrow {{v_2}} $

Answer

$\overrightarrow {{r_1}} \, 	imes \,\overrightarrow {{v_1}} \,\, = \,\,\overrightarrow {{r_2}} \, 	imes \,\,\overrightarrow {{v_2}} $

NEET UG PHYSICS MCQ: WORK-ENERGY-POWER

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