NEET 2016 Phase 2 | Center of Mass and Collision Question 14 | Physics

NEET 2016 Phase 2

MCQ (Single Correct Answer)

-1

A rigid ball of mass m strikes a rigid wall at 60^o and gets reflected without loss of speed as shown in the figure. The value of impulse imparted by the wall on the ball will be :
NEET 2016 Phase 2 Physics - Center of Mass and Collision Question 33 English

NEET 2016 Phase 2 Physics - Center of Mass and Collision Question 33 English

$$mV$$

2 $$mV$$

$${{mV} \over 2}$$

$${{mV} \over 3}$$

NEET 2016 Phase 2

MCQ (Single Correct Answer)

-1

A bullet of mass 10 g moving horizontally with a velocity of 400 m s^$$-$$1 strikes a wood block of mass 2 kg which is suspended by light inextensible string of length 5 m. As a result, the centre of gravity of the block found to rise a vertical distance of 10 cm. The speed of the bullet after it emerges out horizontally from the block will be

100 m s^$$-$$1

80 m s^$$-$$1

120 m s^$$-$$1

160 m s^$$-$$1

NEET 2016 Phase 2

MCQ (Single Correct Answer)

-1

Two identical balls A and B having velocities of 0.5 m s^$$-$$1 and $$-$$0.3 m s^$$-$$1 respectively collide elastically in one dimension. The velocities of B and A after the collision respectively will be :

$$-$$0.5 m s^$$-$$1 and 0.3 m s^$$-$$1

0.5 m s^$$-$$1 and $$-$$0.3 m s^$$-$$1

$$-$$0.3 m s^$$-$$1 and 0.5 m s^$$-$$1

0.3 m s^$$-$$1 and 0.5 m s^$$-$$1

AIPMT 2015 Cancelled Paper

MCQ (Single Correct Answer)

-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 :

$${1 \over 2}$$m₁u$$_1^2$$ + $${1 \over 2}$$ m₂u$$_2^2$$ $$-$$ $$\varepsilon $$ = $${1 \over 2}$$ m₁v$$_1^2$$ + $${1 \over 2}$$m₂v$$_2^2$$

$${1 \over 2}$$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$$_2^2$$

m$$_1^2$$u₁ + m$$_2^2$$u₂ $$-$$ $$\varepsilon $$ = m$$_1^2$$v₁ + m$$_2^2$$v₂

$${1 \over 2}$$m₁u$$_1^2$$ + $${1 \over 2}$$m₂u$$_2^2$$ = $${1 \over 2}$$m₁v$$_1^2$$ + $${1 \over 2}$$m₂v$$_2^2$$ $$-$$ $$\varepsilon $$

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Human Health and Diseases Body Fluids and Its Circulation Locomotion and Movement Neural Control and Coordination Reproduction in Organisms Reproductive Health Structural Organisation in Animals Digestion and Absorption Excretory Products and Their Elimination Chemical Coordination and Integration Human Reproduction Animal Kingdom Breathing and Exchange of Gases Evolution