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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
Name the two quantities, the slope of whose graph give acceleration.
A body with an initial velocity x moves with a uniform acceleration y. Plot its velocity-time graph.
Given alongside is the velocity-time graph for a moving body :
Find :
(i) Velocity of the body at point C.
(ii) Acceleration acting on the body between A and B.
(iii) Acceleration acting on the body between B and C.
From the displacement-time graph of a cyclist given below in the Figure, find The time after which he reaches the starting point .
Diagram shows a velocity – time graph for a car starting from rest. The graph has three sections AB, BC and CD.
From a study of this graph, state how the distance travelled in any section is determined.
From the velocity – time graph given below, calculate Average velocity in region CED.
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?
Which of the following graphs represents a motion with negative acceleration?
What does the slope of velocity-time graph represent?
(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.
