The figure shows the position-time graph of a body of mass 0.04 kg. What is the time between two consecutive impulses received by the body?
1. 2 s
2. 4 s
3. 1 s
4. 3 s
Figure shows the position-time graph of a body of mass 0.04 kg. What is the magnitude of each impulse recieved by the body?
1.
2.
3.
4.
Mark the correct statements about the friction between two bodies.
(a) | static friction is always greater than kinetic friction. |
(b) | coefficient of static friction is always greater than the coefficient of kinetic friction. |
(c) | limiting friction is always greater than kinetic friction. |
(d) | limiting friction is never less than static friction. |
Choose the correct option:
1. | (a), (b) and (c) |
2. | (b), (c) and (d) |
3. | (a) and (d) |
4. | (c) and (d) |
Consider the following two statements
A: | The linear momentum of a particle is independent of the frame of reference. |
B: | The kinetic energy of a particle is independent of the frame of reference. |
1. | Both A and B are true |
2. | A is true but B is false |
3. | A is false but B is true |
4. | Both A and B are false |
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. |
Statement I: | (Newton's 1st Law of Motion) Everybody continues in its state of rest or of uniform motion in a straight line except in so far as it be compelled by an externally impressed force to act otherwise. |
Statement II: | It is observed that when a car brakes suddenly, the passengers are thrown forward. |
1. | Statement I is True, Statement II is True, and Statement I is the correct explanation of Statement II. |
2. | Statement I is True, Statement II is True, and Statement I is not the correct explanation of Statement II. |
3. | Statement I is True, Statement II is False. |
4. | Statement I is False, Statement II is True. |
In the figure, the coefficient of friction between the floor and body \(B\) is \(0.1.\) The coefficient of friction between bodies \(B\) and \(A\) is \(0.2.\) A force \(F\) is applied as shown on \(B.\) The mass of \(A\) is \(rn/2\) and of \(B\) is \(m.\)
(a) | The bodies will move together if \(F = 0.25\text{mg}\) |
(b) | The \(A\) will slip with \(B\) if \(F = 0.5\text{mg}\) |
(c) | The bodies will move together if \(F = 0.5\text{mg}\) |
(d) | The bodies will be at rest if \(F = 0.1\text{mg}\) |
(e) | The maximum value of \(F\) for which the two bodies will move together is \(0.45\text{mg}\) |
Which of the following statement(s) is/are true?
1. (a), (b), (d), (e)
2. (a), (c), (d), (e)
3. (b), (c), (d)
4. (a), (b), (c)
Assertion (A): | Newton's law of action and reaction is a consequence of Newton's law of inertia. |
Reason (R): | Newton's law of inertia implies that any body that is not acted upon by external forces cannot change its state of rest or uniform motion. |
1. | (A) is true but (R) is false. |
2. | (A) is false but (R) is true. |
3. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
4. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
Assertion (A): | Angle of repose is equal to the angle of limiting friction. |
Reason (R): | When a body is just at the point of motion, the force of friction at this stage is called limiting friction. |
1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
3. | (A) is true but (R) is false. |
4. | (A) is false but (R) is true. |