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प्रश्न
Boojho goes to the football ground to play football. The distance-time graph of his journey from his home to the ground is given in the figure.
- What does the graph between points B and C indicate about the motion of Boojho?
- Is the motion between 0 to 4 minutes uniform or non-uniform?
- What is his speed between 8 and 12 minutes of his journey?
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उत्तर
a. Graph between points B and C is a horizontal line which indicates that Boojho is at rest, i.e., his speed is zero.
b. Motion between 0 to 4 minutes is non-uniform as distance-time graph for this time interval is not a straight line.
c. Speed of Boojho between 8 and 12 minutes of his journey
= `((225 - 150) "m")/((12 - 8) "min")`
= `75/4`
= 18.75 m/min
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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 parked on a side road.
Figure shows the distance-time graph for the motion of two vehicles A and B. Which one of them is moving faster?
Figure: Distance-time graph for the motion of two cars
What conclusion can you draw about the speed of a body from the following distance-time graph ?
Fill in the following blank with suitable word :
The slope of a distance-time graph indicates ………………….. of a moving body.
The graph given alongside shows the positions of a body at different times. Calculate the speed of the body as it moves from :
(1) A to B,
(2) B to C, and
(3) C to D.
The slope of the distance-time graph at any point gives______.
The slope of the distance-time graph indicates the speed.
Assertion: The position-time graph of a uniform motion in one dimension of a body can have a negative slope
Reason: When the speed of the body decreases with time then, the position-time graph of the moving body has a negative slope.
Assertion: The slope of the distance-time graph of a body moving with high speed is steeper than the slope of the distance-time graph of a body with low velocity.
Reason: Slope of distance-time graph = speed of the body.
