1
AIPMT 2007
MCQ (Single Correct Answer)
+4
-1
A car moves from X to Y with a uniform speed vu and returns to Y with a uniform speed vd. The average speed for this round trip is
A
$$\sqrt {{v_u}{v_d}} $$
B
$${{{v_d}{v_u}} \over {{v_d} + {v_u}}}$$
C
$${{{v_u} + {v_d}} \over 2}$$
D
$${{2{v_d}{v_u}} \over {{v_d} + {v_u}}}$$
2
AIPMT 2007
MCQ (Single Correct Answer)
+4
-1
The positions x of a particle with respect to time t along x-axis is given by x = 9t2 $$-$$ t3 where x is in metres and t in seconds. What will be the position of this particle when it achieves maximum speed along the + x direction ?
A
54 m
B
81 m
C
24 m
D
32 m
3
AIPMT 2007
MCQ (Single Correct Answer)
+4
-1
Dimensions of resistance in an electrical circuit, in terms of dimension of mass M, of length L, of time T and of current I, would be
A
[ML2T$$-$$2]
B
[ML2T$$-$$1I$$-$$1]
C
[ML2T$$-$$3I$$-$$2]
D
[ML2T$$-$$3I$$-$$1]
4
AIPMT 2007
MCQ (Single Correct Answer)
+4
-1
A block B is pushed momentarily along a horizontaly surface with an initial velocity V. If  $$\mu $$  is the coefficient of sliding friction between B and the surface, block B will come to rest after a time

AIPMT 2007 Physics - Laws of Motion Question 21 English
A
g$$\mu $$/V
B
g/V
C
V/g
D
V/(g$$\mu $$).