Experimental Skills-Screw Gauge [NEET (2024 Updated)-National Eligibility cum Entrance Test (Medical) Physics]: Questions 9 - 12 of 39
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Question 9
Question Assertion-Reason▾
Assertion(Ꭺ)
The center of mass of a proton and an electron, released from their respective positions remains at rest.
Reason(Ꭱ)
The center of mass remains at rest, if no external force is applied.
Choices
Choice (4) | Response | |
---|---|---|
a. | Both Ꭺ and Ꭱ are false | |
b. | Ꭺ is true but Ꭱ is false | |
c. | Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ | |
d. | Ꭺ is false but Ꭱ is true |
Question 10
Question MCQ▾
The velocities of three particles of masses 20g, 30g and 50g are 10i, 10j and 10k respectively. The velocity of the center of mass of the three particles is
Choices
Choice (4) | Response | |
---|---|---|
a. | ||
b. | ||
c. | ||
d. |
Question 11
Question MCQ▾
The two particles X and Y, initially at rest, start moving towards each other under mutual attraction. If at any instant the velocity of X is V and that of Y is 2V, the velocity of their center of mass will be 3
Choices
Choice (4) | Response | |
---|---|---|
a. | V/2 | |
b. | 0 | |
c. | 2V | |
d. | V |
Question 12
Question MCQ▾
A T shaped object, dimensions shown in the figure, a1 lying on a smooth floor. A force F is applied at the poi: P parallel to AB, such that the object has only the translational motion without rotation. Find the location of P with respect to C
Choices
Choice (4) | Response | |
---|---|---|
a. | ||
b. | ||
c. | ||
d. | I |