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Question: Velocity-time Graph, Motion, Class 9 PDF Download

A girl walks along a straight path of about 100m in 50sec to drop a letter and comes back to her initial position. what will be the velocity-time graph?
Ref: https://edurev.in/question/479198/A-girl-walks-along-a-straight-path-of-about-100m-in-50sec-to-drop-a-letter-and-comes-back-to-her-ini

From the graph of displacement time graph, we can interpret that initial velocity is 0 as displacement and time are 0 .

Velocity after 50 seconds; 

= 100/50

=2 m/s

= velocity after 100sec

=zero

Velocity with time table is given below : 

V 0 2 0

t 0 50 100

Refer the attachment for the Displacement time graph and velocity time graph

Question: Velocity-time Graph, Motion, Class 9

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FAQs on Question: Velocity-time Graph, Motion, Class 9

1. What is a velocity-time graph?
Ans. A velocity-time graph is a graphical representation of an object's velocity over a period of time. It shows how the velocity changes with time and provides information about the object's motion.
2. How can we interpret a velocity-time graph?
Ans. To interpret a velocity-time graph, we need to look at the slope of the graph. A positive slope indicates that the object is moving in the positive direction, while a negative slope indicates motion in the negative direction. The steepness of the slope represents the object's acceleration. A horizontal line on the graph indicates a constant velocity.
3. How can we determine an object's average velocity from a velocity-time graph?
Ans. The average velocity of an object can be determined by finding the slope of the line connecting two points on the velocity-time graph. The slope is calculated by dividing the change in velocity by the change in time between the two points.
4. What does a horizontal line on a velocity-time graph represent?
Ans. A horizontal line on a velocity-time graph represents constant velocity. This means that the object is not accelerating and is moving at a steady speed in a particular direction.
5. How can we determine an object's acceleration from a velocity-time graph?
Ans. To determine an object's acceleration from a velocity-time graph, we need to find the slope of the graph. The slope represents the rate of change of velocity, which is the definition of acceleration. A steeper slope indicates a higher acceleration, while a flatter slope represents a lower acceleration.
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