1
NEET 2013 (Karnataka)
MCQ (Single Correct Answer)
+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 (Karnataka)
MCQ (Single Correct Answer)
+4
-1
A car is moving in a circular horizontal track of radius 10 m with a constant speed of 10 m/s. A bob is suspended from the roof of the car by a light wire of length 1.0 m. The angle made by the wire with the vertical is
A
$${\pi \over 3}$$
B
$${\pi \over 6}$$
C
$${\pi \over 4}$$
D
0o
3
NEET 2013 (Karnataka)
MCQ (Single Correct Answer)
+4
-1
A person holding a rifle (mass of person and rifle together is 100 kg) stands on a smooth surface and fires 10 shots horizontally, in 5 s. Each bullet has a mass of 10 g with a muzzle velocity of 800 m s$$-$$1. The final velocity acquired by the person and the average force exerted on the person are :
A
$$-$$0.08 ms$$-$$1, 16 N
B
$$-$$0.8 ms$$-$$1, 8 N
C
$$-$$1.6 ms$$-$$1, 16 N
D
$$-$$1.6 ms$$-$$1, 8 N
4
NEET 2013 (Karnataka)
MCQ (Single Correct Answer)
+4
-1
A particle with total energy E is moving in a potential energy region U(x). Motion of the particle is restricted to the region when
A
U(x) < E
B
U(x) = 0
C
U(x) $$ \le $$ E
D
U(x) > E
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