TEST SERIES FOR AIPMT (HALF SYLLABUS) - Career Point

Q.24 Suppose a r and v r denote the acceleration and
velocity respectively of a body in one
dimensional motion, then -
(a) speed must increase when a > 0
r
(b) speed will increase when v r and d r are > 0
(c) speed must decreases when a < 0
r
(d) speed will decrease when v < 0
r
and a > 0
r
(1) a, b (2) b, c (3) b, d (4) c,d
Q.25 When a force of constant magnitude always acts
perpendicular to the motion of a particle, then:
(1) Velocity is constant
(2) Acceleration is constant
(3) K.E. is constant
(4) None of these
Q.26 A plumb line suspended from the roof of a
carriage moving with an acceleration a, inclines
at an angle θ with the vertical:
(1) a = g tan θ (2) a = F/m
(3)
dv
a = (4)
dt
2
d x
a =
2
dt
Q.27 A block A of mass 2kg rests on another block B
of mass 8 kg which rests on a horizontal floor.
The coefficient of friction between A and B is
0.2 while that between B and floor is 0.5. When a
horizontal force of 25 N is applied on the block
B, the force of friction between A and B is:
(1) Zero (2) 3.9 N
(3) 5.0 N (4) 49 N
Q.28 A false balance has equal arms. An object
weighs W1 when placed in one pan and W2
when placed in the other pan. The true weight
W of the object is:
(1) (W1 × W2) 1/2
2
1
2
2
(2) ( W + W )
1/
2
(3) W + ) / 2
( 1 2 W
(4) 2W1W2/(W1 + W2)
Q.24 ekuk a r rFkk v r ,d foeh; xfr esa ,d oLrq ds
Øe'k% Roj.k rFkk osx dks fu#fir djrs gS] rc&
(a) pky c 0
r
(b) pky c 0 gS
(c) pky ?kVsxh tc a < 0
r
(d) pky ?kVsxh tc v < 0
r
rFkk a > 0
r
(1) a, b (2) b, c (3) b, d (4) c,d
Q.25 tc fu;r ifjek.k dk ,d cy lnSo ,d d.k dh
xfr ds yEcor~ dk;Z djrk gS] rc
(1) osx fu;r gS
(2) Roj.k fu;r gS
(3) K.E. fu;r gS
(4) buesa ls dksbZ ugha
Q.26 ,d lkgqy a Roj.k ls xfreku ,d okgd dh NM+ ls
Å/okZ/kj ds lkFk θ dks.k ij >qds gq;s yVdk gqvk gS] rks
(1) a = g tan θ (2) a = F/m
CAREER POINT, CP Tower, Road No.1, IPIA, Kota (Raj.), Ph: 0744-3040000 Page # 6
(3)
dv
a = (4)
dt
2
d x
a =
2
dt
Q.27 2kg nzO;eku dk ,d CykWd A ,d {kSfrt Q'kZ ij
fojke esa fLFkr 8 kg nzO;eku ds ,d vU; CykWd ij
fojke eas j[kk gSA A rFkk B ds e/; ?k"kZ.k xq.kkad 0.2
gS tcfd B rFkk Q'kZ ds e/; 0.5 gSA 25N dk ,d
{kSfrt cy CykWd B ij vkjksfir fd;k tkrk gS] rks
A rFkk B ds e/; ?k"kZ.k cy gS&
(1) 'kwU; (2) 3.9 N
(3) 5.0 N (4) 49 N
Q.28 ,d =kqfV;qDr rqyk dh Hkqtk;sa leku gSA ,d oLrq
W1 Hkkj n'kkZrh gSA tc ,d iyM+s ij j[kh tkrh gS
rFkk W2 Hkkj n'kkZrh gS tc nwljs iyM+s ij j[kh
tkrh gSA oLrq dk lgh Hkkj W gS&
(1) (W1 × W2) 1/2
2
1
2
2
(2) ( W + W )
1/
2
(3) ( 1 2)
/ 2 W W +
(4) 2W1W2/(W1 + W2)