1
AIPMT 2015 Cancelled Paper
MCQ (Single Correct Answer)
+4
-1
Change Language
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
2
AIPMT 2015 Cancelled Paper
MCQ (Single Correct Answer)
+4
-1
Change Language
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$$_2^2$$ $$-$$ $$\varepsilon $$
3
AIPMT 2015 Cancelled Paper
MCQ (Single Correct Answer)
+4
-1
Change Language
A block of mass 10 kg, moving in x direction with a constant speed of 10 m s$$-$$1, is subjected to a retarding force F = 0.1x J/m during its travel from x = 20 m to 30 m. Its final KE will be
A
275 J
B
250 J
C
475 J
D
450 J
4
AIPMT 2015 Cancelled Paper
MCQ (Single Correct Answer)
+4
-1
Change Language
A block A of mass m1 rests on a horizontal table. A light string connected to it passes over a frictionless pully at the edge of table and from its other end another block B of mass m2 is suspended. The coefficient of kinetic friction between the block and the table is $$\mu $$k. When the block A is sliding on the table, the tension in the string is
A
$${{{m_1}{m_2}(1 + {\mu _k})g} \over {({m_1} + {m_2})}}$$
B
$${{{m_1}{m_2}(1 - {\mu _k})g} \over {({m_1} + {m_2})}}$$
C
$${{\left( {{m_2} + {\mu _k}{m_1}} \right)g} \over {\left( {{m_1} + {m_2}} \right)}}$$
D
$${{\left( {{m_2} - {\mu _k}{m_1}} \right)g} \over {\left( {{m_1} + {m_2}} \right)}}$$