1
NEET 2013 (Karnataka)
+4
-1
Vectors $$\overrightarrow A ,\overrightarrow B$$ and $$\overrightarrow C$$ are such that $$\overrightarrow A .\overrightarrow B = 0$$ and $$\overrightarrow A .\overrightarrow C = 0$$. Then the vector parallel to $$\overrightarrow A$$ is
A
$$\overrightarrow A \times \overrightarrow B$$
B
$$\overrightarrow B + \overrightarrow C$$
C
$$\overrightarrow B \times \overrightarrow C$$
D
$$\overrightarrow B$$ and $$\overrightarrow C$$
2
NEET 2013
+4
-1
The velocity of a projectile at the initial point A is $$\left( {2\widehat i + 3\widehat j} \right)$$ m/s. It's velocity (in m/s) at point B is
A
$$2\widehat i - 3\widehat j$$
B
$$2\widehat i + 3\widehat j$$
C
$$-$$$$2\widehat i - 3\widehat j$$
D
$$-$$$$2\widehat i + 3\widehat j$$
3
AIPMT 2012 Prelims
+4
-1
The horizontal range and the maximum height of a projectile are equal. The angle of projection of the projectile is
A
$$\theta$$ = tan$$-$$1$$\left( {{1 \over 4}} \right)$$
B
$$\theta$$ = tan$$-$$1(4)
C
$$\theta$$ = tan$$-$$1(2)
D
$$\theta$$ = 45o
4
AIPMT 2012 Prelims
+4
-1
A particle has initial velocity $$\left( {2\overrightarrow i + 3\overrightarrow j } \right)$$ and acceleration $$\left( {0.3\overrightarrow i + 0.2\overrightarrow j } \right)$$. The magnitude of velocity after 10 seconds will be
A
$$9\sqrt 2$$
B
$$5\sqrt 2$$
C
5 units
D
9 units
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