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प्रश्न
A body is moving along a circular path of radius r. What will be the distance and displacement of the body when it completes:
Two full revolutions
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उत्तर
Distance travelled is two times the perimeter of cirle.
So distance travelled is =4π r.
Displacement =0 as starting and ending point are coinciding.
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संबंधित प्रश्न
A body at rest is made to fall from the top of a tower. Its displacement at different instants is given in the following table:
| Time (in s) | 0.1 | 0.2 | 0.3 | 0.4 | 0.5 | 0.6 |
| Displacement (in m) | 0.05 | 0.20 | 0.45 | 0.80 | 1.25 | 1.80 |
Draw a displacement-time graph and state whether the motion is uniform or non-uniform?
Figure (a) shows the velocity-time graph for the motion of a body. Use it to find the displacement of the body at t = 1 s, 2 s, 3 s and 4 s, then draw on Figure (b), the displacement-time graph for it.
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| (a) | (b) |
Figure given below shows a velocity-time graph for a car starting from rest. The graph has three parts AB, BC and CD.
State how is the distance travelled in any part determined from this graph .
Can you suggest the kind of motion of a body from the following distance – time graph?
Write the SI units for measurement of distance and displacement.
Exercise Problems.
An athlete completes one round of a circular track of diameter 200 m in 40 s. What will be the distance covered and the displacement at the end of 2 m and 20 s?
The displacement is zero when the initial and final positions are ______.
A scalar quantity has ______.
The displacement covered by the second hand of radius V in a clock after one revolution is ______.
Distance travelled by a freely falling body is proportional to ______.
