1
AIPMT 2011 Mains
+4
-1
The density of a material in CGS system of units is 4 g cm$$-$$3. In a system of units in which unit of length is 10 cm and unit of mass is 100 g, the value of density of material will be
A
0.04
B
0.4
C
40
D
400
2
AIPMT 2011 Mains
+4
-1
A particle covers half of its total distance with speed v1 and the rest half distance with speed v2. Its average speed during the complete journey is
A
$${{{v_1} + {v_2}} \over 2}$$
B
$${{{v_1}{v_2}} \over {{v_1} + {v_2}}}$$
C
$${{2{v_1}{v_2}} \over {{v_1} + {v_2}}}$$
D
$${{v_1^2v_2^2} \over {v_1^2 + v_2^2}}$$
3
AIPMT 2011 Mains
+4
-1
A projectile is fired at an angle of 45o with the horizontal. Elevation angle of the projectile at its highest point as seen from the point of projection, is
A
45o
B
60o
C
tan$$-$$1 $$\left( {{1 \over 2}} \right)$$
D
tan$$-$$1 $$\left( {{{\sqrt 3 } \over 2}} \right)$$
4
AIPMT 2011 Mains
+4
-1
A conveyor belt is moving at a constant speed of 2 ms$$-$$1. A box is gently dropped on it. The coefficient of friction between them is $$\mu$$ = 0.5. The distance that the box will move relativce to belt before coming to rest on it, taking g = 10 m s$$-$$2,, is
A
0.4 m
B
1.2 m
C
0.6 m
D
zero
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