AIPMT 2005 | Motion in a Plane Question 40 | Physics

If the angle between the vectors $$\overrightarrow A $$ and $$\overrightarrow B $$ is $$\theta $$, the value of the product $$\left( {\overrightarrow B \times \overrightarrow A } \right).\overrightarrow A $$ is equal to

BA²sin$$\theta $$

BA²cos$$\theta $$

BA²sin$$\theta $$cos$$\theta $$

zero.

AIPMT 2005

MCQ (Single Correct Answer)

-1

Two boys are standing at the ends A and B of a ground where AB = a. The boy at B starts running in a direction perpendicular to AB with velocity v₁. The boy at A starts running simultaneously with velocity v and catches the other in a time t, where t is

$${a \over {\sqrt {{v^2} + {v_1}^2} }}$$

$${a \over {v + {v_1}}}$$

$${a \over {v - {v_1}}}$$

$$\sqrt {{a \over {{v^2} - {v_1}^2}}} $$

AIPMT 2004

MCQ (Single Correct Answer)

-1

If $$\left| {\overrightarrow A \times \overrightarrow B } \right| = \sqrt 3 \overrightarrow A .\overrightarrow B $$ then the value of $$\left| {\overrightarrow A + \overrightarrow B } \right|$$ is

(A² + b² + AB)^1/2

$${\left( {{A^2} + {B^2} + {{AB} \over {\sqrt 3 }}} \right)^{1/2}}$$

A + B

(A² + B² + $${\sqrt 3 }$$AB)^1/2.

AIPMT 2003

MCQ (Single Correct Answer)

-1

The vector sum of two forces is perpendicular to their vector differences. In that case, the forces

are equal to each other

are equal to each other in magnitude

are not equal to each other in magnitude

cannot be predicted.

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