Physics-
General
Easy
Question
A block A of mass 10 kg, connected to another hollow block B of same size and negligible mass, by a spring of spring constant 500 N/m, floats in water as shown in the figure. The compression in the spring is block A just touch the upper surface :
- 10 cm
- 20 cm
- 50 cm
- 100 cm.
The correct answer is: 10 cm
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Assertion: A massless rope thrown over a frictionless pulley has a ladder with a mass of m on one its ends and a counter balancing mass M on its other end. If a man climbs with some velocity then centre of mass of the system (man, ladder and balancing mass) moving upward.
Reason: Net force on the system is in upward direction is zero.
A) If both Assertion and Reason are true and Reason is the correct explanation of the Assertion.
B) If both Assertion and Reason are true but Reason is not correct explanation of the Assertion.
C) If Assertion is true but Reason is false.
D) If Assertion is false but Reason is true.
Assertion: A massless rope thrown over a frictionless pulley has a ladder with a mass of m on one its ends and a counter balancing mass M on its other end. If a man climbs with some velocity then centre of mass of the system (man, ladder and balancing mass) moving upward.
Reason: Net force on the system is in upward direction is zero.
A) If both Assertion and Reason are true and Reason is the correct explanation of the Assertion.
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C) If Assertion is true but Reason is false.
D) If Assertion is false but Reason is true.
physics-General
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Assertion: If the moment of inertia of a non-uniform ring of mass M and radius R is known about an AA', then we can calculate the moment of inertia about BB' (C is the geometrical centre of ring).
Reason: 
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B) If both Assertion and Reason are true but Reason is not correct explanation of the Assertion.
C) If Assertion is true but Reason is false.
D) If Assertion is false but Reason is true.
Assertion: If the moment of inertia of a non-uniform ring of mass M and radius R is known about an AA', then we can calculate the moment of inertia about BB' (C is the geometrical centre of ring).
Reason:
A) If both Assertion and Reason are true and Reason is the correct explanation of the Assertion.
B) If both Assertion and Reason are true but Reason is not correct explanation of the Assertion.
C) If Assertion is true but Reason is false.
D) If Assertion is false but Reason is true.
physics-General
