- 1(current)
Q. No.A particle moves along the x-axis as:
\(x=u(t-2)+a(t-2)^2\)
| a. | the initial velocity of the particle is \(u.\) |
| b. | the acceleration of the particle is \(a.\) |
| c. | the acceleration of the particle is \(2a.\) |
| d. | at \(t=2\) s particle is at the origin. |
Choose the correct option:
| 1. | (a) and (b) | 2. | (b) and (c) |
| 3. | (c) and (d) | 4. | (a) and (d) |
Mark the correct statements for a particle going on a straight line:
| a. | if the velocity and acceleration have opposite sign, the object is slowing down. |
| b. | if the position and velocity have opposite sign, the particle is moving towards the origin. |
| c. | if the velocity is zero at an instant, the acceleration should also be zero at that instant. |
| d. | if the velocity is zero for a time interval, the acceleration is zero at any instant within the time interval. |
Choose the correct option:
| 1. | (a), (b) and (c) |
| 2. | (a), (b) and (d) |
| 3. | (b), (c) and (d) |
| 4. | all of these |
The velocity of a particle is zero at t = 0.
(a) The acceleration at t = 0 must be zero
(b) The acceleration at t = 0 may be zero
(c) If the acceleration is zero from t = 0 to t = 10 s, the speed is also zero in this interval
(d) If the speed is zero from t = 0 to t = 10s the acceleration is also zero in this interval
Choose the correct option:
1. (a), (b) and (c)
2. (b), (c) and (d)
3. (c), (d) and (a)
4. (a), (b) and (d)
Mark the correct statements:
| 1. | The magnitude of the velocity of a particle is equal to its speed. |
| 2. | The magnitude of average velocity in an interval is equal to its average speed in that interval. |
| 3. | It is possible to have a situation in which the speed of a particle is always zero but the average speed is not zero. |
| 4. | It is possible to have a situation in which the speed of the particle is never zero but the average speed in an interval is zero. |
The velocity-time plot for a particle moving on a straight line is shown in the figure
(a) The particle has a constant acceleration
(b) The particle has never turned around
(c) The particle has zero displacement
(d) The average speed in the interval 0 to 10 s is the same as the average speed in the interval 10 s to 20 s
Choose the correct option:
1. (a) and (b)
2. (b) and (c)
3. (c) and (d)
4. (a) and (d)
- 1(current)
Q. No.
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