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प्रश्न
A particle moves along a circular path. How many times does it change its direction in two complete rounds?
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उत्तर
As in circular motion direction changes continuously with motion so after two complete revolutions we can say that direction has changed infinite times.
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संबंधित प्रश्न
Is displacement a scalar quantity ?
In which of the following cases of motion, the distance moved and the magnitude of displacement are equal?
Figure ahead represents the displacement - time sketch of motion of two cars A and B . Find :
(i) the distance by which the car B was initially ahead of car A.
(ii) the velocities of car A and car B.
(iii) the time in which car A catches car B.
(iv) the distance from start when the car A will catch the car B.
Give two differences between displacement and distance.
Define displacement.
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
An object is thrown vertically upwards. It rises upto a height H and then returns to its initial position. Calculate
The total distance traveled by the object
The table below shows the distance travelled by two vehicles A and B during each second:
| Time (s) | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| Distance travelled by A (m) | 0 | 20 | 80 | 180 | 240 | 300 | 360 | 420 |
| Distance travelled by B (m) | 0 | 10 | 40 | 90 | 160 | 250 | 360 | 490 |
Give the value of the velocity at which they are meeting
The rate of change of displacement ______.
Assertion: If the displacement of the body is zero, the distance covered by it may not be zero.
Reason: Displacement is a vector & distance is a scalar quantity.
