1
AIPMT 2015 Cancelled Paper
MCQ (Single Correct Answer)
+4
-1
Two particles of masses m1, m2 move with initial velocities u1 and u2. On collision, one of the particles get excited to higher level, after absorbing energy $$\varepsilon $$. If final velocities of particles be v1 and v2 then we must have :
A
$${1 \over 2}$$m1u$$_1^2$$ + $${1 \over 2}$$ m2u$$_2^2$$ $$-$$ $$\varepsilon $$ = $${1 \over 2}$$ m1v$$_1^2$$ + $${1 \over 2}$$m2v$$_2^2$$
B
$${1 \over 2}$$m$$_1^2$$u$$_1^2$$ + $${1 \over 2}$$m$$_2^2$$u$$_2^2$$ + $$\varepsilon $$ = $${1 \over 2}$$m$$_1^2$$v$$_1^2$$ + $${1 \over 2}$$m$$_2^2$$v$$_2^2$$
C
m$$_1^2$$u1 + m$$_2^2$$u2 $$-$$ $$\varepsilon $$ = m$$_1^2$$v1 + m$$_2^2$$v2
D
$${1 \over 2}$$m1u$$_1^2$$ + $${1 \over 2}$$m2u$$_2^2$$ = $${1 \over 2}$$m1v$$_1^2$$ + $${1 \over 2}$$m2v$$_2^2$$ $$-$$ $$\varepsilon $$
2
AIPMT 2015 Cancelled Paper
MCQ (Single Correct Answer)
+4
-1
Two similar springs P and Q have spring constants KP and KQ, such that KP > KQ. They are stretched first by the same amount (case a), then by the same force (case b). The work done by the springs WP and WQ are related as, in case (a) and case (b) respectively
A
WP > WQ;  WQ > WP
B
WP < WQ;  WQ < WP
C
WP = WQ;  WP > WQ
D
WP = WQ;  WP = WQ
3
AIPMT 2015 Cancelled Paper
MCQ (Single Correct Answer)
+4
-1
A rod of weight W is supported by two parallel knife edges A and B and is in equilibrium in a horizontal position. The knives are at a distance d from each other. The centre of mass of the rod is at distance x from A. The normal reaction on A is
A
$${{W\left( {d - x} \right)} \over x}$$
B
$${{W\left( {d - x} \right)} \over d}$$
C
$${{Wx} \over d}$$
D
$${{Wd} \over x}$$
4
AIPMT 2015 Cancelled Paper
MCQ (Single Correct Answer)
+4
-1
Three identical spherical shells, each of mass m and radius r are placed as shown in figure. Consider an axis XX' which is touching to two shells and passing through diameter of third shell. Moment of inertia of the system consisting of these three spherical shells about XX' axis is

AIPMT 2015 Cancelled Paper Physics - Rotational Motion Question 66 English
A
$${{16} \over 5}m{r^2}$$
B
4mr2
C
$${{11} \over 5}m{r^2}$$
D
3mr2
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