Velocity - Time Graphs

Author:Amisha Singh
9th CBSE
IMPORTANT

Important Questions on Velocity - Time Graphs

EASY
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What can you say about the motion of a body, if its velocity-time graph is parallel to the time axis?

MEDIUM
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A car is moving on a straight road with uniform acceleration. The speed of the car varies with time as follows:

Time (s) 0 2 4 6 8 10
Speed ms-1 4 8 12 16 20 24

Draw the speed-time graph by choosing a convenient scale. Determine from it:
The distance traveled by the car in 10 seconds.

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Name the quantity, the slope of whose graph against time gives acceleration.

MEDIUM
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Given below are some speed-time graphs. In which of the graphs,
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(a) speed is constant.

(b) speed is increasing

(c) speed is decreasing

(d) What happens in (iv)?

(e) What happens in (v)?

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What conclusion can you draw about the acceleration of a body from the speed-time graph shown in figure.
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What can you say about the motion of a body if its speed-time graph is straight line parallel to the time axis?

MEDIUM
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Three speed-time graphs are given below:
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Which case represents the case of:
(a) a ball is thrown vertically upwards and returns to the hand of the thrower?

(b) a body decelerating to a constant speed then accelerating uniformly?

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Figure shows the velocity-time graph for the objects A and B, moving along the same direction. Which object has greater acceleration?
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What does the slope of a speed-time graph indicate?

MEDIUM
IMPORTANT

A car is moving on a straight road with uniform acceleration. The speed of the car varies with time as follows:

Time (s) 0 2 4 6 8 10
Speed ms-1 4 8 12 16 20 24

Draw the speed-time graph by choosing a convenient scale. Determine from it:
 acceleration of the car

MEDIUM
IMPORTANT

The graph given in figure shows how the speed of a train changes with time. Find the distance traveled in first 8 hours.
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EASY
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The graph given in figure show how the speed of a train changes with time. Which part of the graph shows varying retardation?
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The graph given in figure show how the speed of a train changes with time. Which part of the graph show zero acceleration?

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The graph given in figure show how the speed of a train changes with time. Which part of the graph shows uniform acceleration?
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The graph given in figure shows how the speed of a train changes with time. What is the maximum speed attained by the train?
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The graph given in figure shows how the speed of a train changes with time. What is the initial speed of the train?
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The speed-time graph of an ascending passenger lift is given below. Find the acceleration of the lift during the last two seconds.
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The speed-time graph of an ascending passenger lift is given below. Find the acceleration of the lift between second and tenth second
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The speed-time graph of an ascending passenger lift is given below. Find the acceleration of the lift during the first two seconds
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From the velocity-time graph shown in figure find acceleration of the body between C and D.

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