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प्रश्न
Define speed. What is its S.I. unit?
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उत्तर
The speed of a body is the rate of change of distance with time.
Its SI unit is metre/second (m/s).
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संबंधित प्रश्न
Show by using the graphical method that: `s=ut+1/2at^2` where the symbols have their usual meanings.
Represent the position of a body described as at 15 m, 30o north of west, on a graph paper.
The area of the right triangle under a speed-time graph is 500 m, in a time interval of 20 s. What is the speed of the body? Is the motion uniform or non-uniform?
Draw the following graph:
Distance versus time for a body at rest.
Draw the following graph:
Speed versus time for a fluctuating speed.
Figure shows the distance-time graph of three students A, B and C. On the basis of the graph, answer the following :
How far did B travel between the time he passed C and A?
(i) In speed time graph uniform motion is given by a straight line parallel to x axis so figure (a) denotes the uniform motion.
(ii) In speed time graph motion with increasing speed is shown by straight line with positive slope so figure (c) denotes the motion with speed increasing.
(iii) In speed time graph motion with decreasing speed is shown by straight line with negative slope so figure (b) denotes the motion with speed decreasing.
(iv) In speed time graph motion with oscillating speed is shown by zigzag line so figure {d) denotes the motion with speed oscillating.
The slope of the speed–time graph gives ______.
State whether true or false. If false, correct the statement.
If the velocity – time graph of a particle is a straight line inclined to X-axis then its displacement – time graph will be a straight line.
Which of the following can determine the acceleration of a moving object.
