AIPMT 2015 | Work, Energy and Power Question 22 | Physics

AIPMT 2015

MCQ (Single Correct Answer)

-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

3.0

1.50

1.70

2.35

AIPMT 2015

MCQ (Single Correct Answer)

-1

Two particles A and B, move with constant velocities $$\overrightarrow {{v_1}} $$ and $$\overrightarrow {{v_2}} $$. At the initial moment their position vectors are $$\overrightarrow {{r_1}} $$ and $$\overrightarrow {{r_2}} $$ respectively. The condition for particles A and B for their collision is

$${\overrightarrow r _1} \times {\overrightarrow v _1} = {\overrightarrow r _2} \times {\overrightarrow v _2}$$

$${\overrightarrow r _1} - {\overrightarrow r _2} = {\overrightarrow v _1} - {\overrightarrow v _2}$$

$${{{{\overrightarrow r }_1} - {{\overrightarrow r }_2}} \over {\left| {{{\overrightarrow r }_1} - {{\overrightarrow r }_2}} \right|}} = {{{{\overrightarrow v }_2} - {{\overrightarrow v }_1}} \over {\left| {{{\overrightarrow v }_2} - {{\overrightarrow v }_1}} \right|}}$$

$${\overrightarrow r _1}.{\overrightarrow v _1} = {\overrightarrow r _2}.{\overrightarrow v _2}$$

AIPMT 2015

MCQ (Single Correct Answer)

-1

A ball is thrown vertically downwards from a height of 20 m with an initial velocity v₀. It collides with the ground, losses 50 percent of its energy in collision and rebounds to the same height. The initial velocity v₀ is
(Take g = 10 m s^$$-$$2)

28 m s^$$-$$1

10 m s^$$-$$1

14 m s^$$-$$1

20 m s^$$-$$1

AIPMT 2015 Cancelled Paper

MCQ (Single Correct Answer)

-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

$$\sqrt {2mk} {\,t^{ - 1/2}}$$

$${1 \over 2}\sqrt {mk} \,{t^{ - 1/2}}$$

$$\sqrt {{{mk} \over 2}} \,{t^{ - 1/2}}$$

$$\sqrt {mk} \,{t^{ - 1/2}}$$

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