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Q. No.Given below are two statements:
| Statement I: | Given that the magnitude of the acceleration of a body is constant, the force acting on it must be constant. |
| Statement II: | Newton's second law leads to the statement that the acceleration of a body is directly proportional to the net force acting on it. |
| 1. | Statement I is incorrect and Statement II is correct. |
| 2. | Both Statement I and Statement II are correct. |
| 3. | Both Statement I and Statement II are incorrect. |
| 4. | Statement I is correct and Statement II is incorrect. |
Subtopic: Â Newton's Laws |
Level 3: 35%-60%
Hints
A block of mass \(M\) lies at rest on a horizontal table.
| Statement I: | (Newton's 3rd Law) To every action, there is an equal and opposite reaction. Action and reaction forces act on different bodies and in opposite directions. |
| Statement II: | The normal reaction is the reaction force, while the weight is the action. |
| 1. | Statement I is True, Statement II is True and Statement I is the correct reason for Statement II. |
| 2. | Statement I is True, Statement II is True and Statement I is not the correct reason for Statement II. |
| 3. | Statement I is True, Statement II is False. |
| 4. | Statement I is False, Statement II is True. |
Subtopic: Â Newton's Laws |
Level 3: 35%-60%
Hints
A balloon ascending with an acceleration \(a\) has a ballast of mass \(m\) thrown out, and it is observed to move upward with double the acceleration. The mass of the remaining part (after the ballast is thrown out) is:
| 1. | \(m\dfrac{g+2a}{g+a}\) |
| 2. | \(m\dfrac{g+a}{g}\) |
| 3. | \(m\dfrac{g+a}{a}\) |
| 4. | \(m\dfrac{g+2a}{g}\) |
Subtopic: Â Newton's Laws |
 52%
Level 3: 35%-60%
Hints
Blocks \(A\) and \(B\) are connected as shown by an ideal string passing over a smooth pulley and released from rest. Take \(g = 10~\text{m/s}^2.\) The acceleration of the block \(B,\) relative to \(A,\) will be:
1. \(5~\text{m/s}^2\)
2. \(4~\text{m/s}^2\)
3. \(2~\text{m/s}^2\)
4. \(1~\text{m/s}^2\)
Subtopic: Â Newton's Laws |
 58%
Level 3: 35%-60%
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Q. No.
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