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प्रश्न
Study the speed-time graph of a car given alongside and answer the following questions:
(i) What type of motion is represented by OA ?
(ii) What type of motion is represented by AB ?
(iii) What type of motion is represented by BC ?
(iv) What is the acceleration of car from O to A ?
(v)What is the acceleration of car from A to B ?
(vi) What is the retardation of car from B to C ?
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उत्तर
(i) OA represents uniform acceleration
(ii) AB represents constant speed.
(iii) BC represents uniform retardation.
(iv) Acceleration of car from O to A = slope of line OA
`a = ((40-0))/((10-0))
= 4 "m/s"^2`
(v) Acceleration of car from A to B is zero as it has uniform speed .
(vi) Retardation of car from B to C = slope of line BC
`a = ((40-0))/((50-30)) "m/s"^2`
= `2 "m/s"^2`
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संबंधित प्रश्न
Draw a velocity-time graph to show the following motion :
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Show by means of graphical method that: v = u + at, where the symbols have their usual meanings.
What can you say about the motion of a body if:
its displacement-time graph is a straight line ?
What type of motion is represented by the following graph ?
For uniform motion _________
Given below are the speed -time graphs. Match them with their corresponding motions :
 |
(a) Uniformity retared motion |
 |
(b) Non-uniformity acceleration |
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(c) Non-uniform motion |
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(d) uniform motion |
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(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.
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An object is moving in a positive direction with positive acceleration. The velocity-time graph with constant acceleration which represents the above situation is:
