1
NEET 2016 Phase 2
MCQ (Single Correct Answer)
+4
-1
Change Language
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
A
100 m s$$-$$1
B
80 m s$$-$$1
C
120 m s$$-$$1
D
160 m s$$-$$1
2
NEET 2016 Phase 2
MCQ (Single Correct Answer)
+4
-1
Change Language
A rigid ball of mass m strikes a rigid wall at 60o 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 34 English
A
$$mV$$
B
2 $$mV$$
C
$${{mV} \over 2}$$
D
$${{mV} \over 3}$$
3
NEET 2016 Phase 2
MCQ (Single Correct Answer)
+4
-1
Change Language
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 :
A
$$-$$0.5 m s$$-$$1 and 0.3 m s$$-$$1
B
0.5 m s$$-$$1 and $$-$$0.3 m s$$-$$1
C
$$-$$0.3 m s$$-$$1 and 0.5 m s$$-$$1
D
0.3 m s$$-$$1 and 0.5 m s$$-$$1
4
NEET 2016 Phase 2
MCQ (Single Correct Answer)
+4
-1
Change Language
A light rod of length $$l$$ has two masses m1 and m2 attached to its two ends. The moment of inertia of the system about an axis perpendicular to the rod and passing through the centre of mass is
A
$${{{m_1}{m_2}} \over {{m_1} + {m_2}}}{l^2}$$
B
$${{{m_1} + {m_2}} \over {{m_1}{m_2}}}{l^2}$$
C
$$\left( {{m_1} + {m_2}} \right){l^2}$$
D
$$\sqrt {{m_1}{m_2}} \,{l^2}$$