1
AIPMT 2015
+4
-1
The heart of a man pumps 5 litres of blood through the arteries per minute at a pressure of 150 mm of mercury. If the density of mercury be 13.6 $$\times$$ 103 kg/m3 and g = 10 m/s2 then the power (in watt) is
A
3.0
B
1.50
C
1.70
D
2.35
2
AIPMT 2015
+4
-1
On a frictionless surface, a block of mass M moving at speed v collides elastically with another block of same mass M which is initially at rest. After collision the first block moves at an angle $$\theta$$ to its initial direction and has a speed $${v \over 3}.$$ The second block's speed after the collision is
A
$${3 \over {\sqrt 2 }}v$$
B
$${{\sqrt 3 } \over 2}v$$
C
$${{2\sqrt 2 } \over 3}v$$
D
$${3 \over 4}v$$
3
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
4
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
$$\sqrt {mk} \,{t^{ - 1/2}}$$
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