1
AIPMT 2015 Cancelled Paper
+4
-1
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
2
AIPMT 2015 Cancelled Paper
+4
-1
A particle of mass m is driven by a machine that delivers a constant power k watts. If the particle starts from rest the force on the particle at time t is
A
$$\sqrt {2mk} {\,t^{ - 1/2}}$$
B
$${1 \over 2}\sqrt {mk} \,{t^{ - 1/2}}$$
C
$$\sqrt {{{mk} \over 2}} \,{t^{ - 1/2}}$$
D
$$\sqrt {mk} \,{t^{ - 1/2}}$$
3
AIPMT 2015 Cancelled Paper
+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
4
NEET 2013 (Karnataka)
+4
-1
A particle with total energy E is moving in a potential energy region U(x). Motion of the particle is restricted to the region when
A
U(x) < E
B
U(x) = 0
C
U(x) $$\le$$ E
D
U(x) > E
EXAM MAP
Medical
NEET