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प्रश्न
What can you say about the motion of an object if its speed-time graph is a straight line parallel to the time axis?
उत्तर
The object is moving uniformly.
A straight line parallel to the time axis in a speed-time graph indicates that, with a change in time, there is no change in the speed of the object. This indicates the uniform motion of the object.
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संबंधित प्रश्न
The speed-time graph for a car is shown in the following figure:
- Find how far the car travels in the first 4 seconds. Shade the area on the graph that represents the distance travelled by the car during the period.
- Which part of the graph represents uniform motion of the car?
Show the shape of the distance-time graph for the motion in the following case:
A car moving with a constant speed.
What conclusion can you draw about the speed of a body from the following distance-time graph ?
A cyclist is travelling at 15 m s-1. She applies brakes so that she does not collide with a wall 18 m away. What deceleration must she have ?
Four cars A, B, C and D are moving on a levelled, straight road. Their distance-time graphs are shown in the given figure. Which of the following is the correct statement regarding the motion of these cars?
A spaceship is moving in space with a velocity of 60 kms−1. It fires its retro engines for 20 seconds and velocity is reduced to 55 kms−1. Calculate the distance travelled by a spaceship in 40 s, from the time of firing of the retro- rockets.
Write down the type of motion of a body in each of the following distance time-graph.
What are the uses of the graphical study of motion?
Two students were asked to plot a distance-time graph for the motion described in Table A and Table B.
Table A
| Distance moved (m) | 0 | 10 | 20 | 30 | 40 | 50 |
| Time (minutes) | 0 | 2 | 4 | 6 | 8 | 10 |
Table B
| Distance moved (m) | 0 | 5 | 10 | 15 | 20 | 25 |
| Time (minutes) | 0 | 1 | 2 | 3 | 4 | 5 |
The graph given in Figure 13.2 is true for
The slope of the distance-time graph indicates the speed.
