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प्रश्न
Define speed. What is its S.I. unit?
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उत्तर
The speed of a body is the rate of change of distance with time.
Its SI unit is metre/second (m/s).
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संबंधित प्रश्न
What is the quantity which is measured by the area occupied below the velocity-time graph?
Three speed-time graphs are given below :
Which graph represents the case of:
(i) a cricket ball thrown vertically upwards and returning to the hands of the thrower ?
(ii) a trolley decelerating to a constant speed and then accelerating uniformly ?
Draw displacement – time graph for the following situation:
When a body is stationary.
Draw velocity – time graph for the following situation:
When a body is moving with variable velocity, but uniform acceleration.
Draw velocity-time graph to show:
Deceleration
Write a sentence to explain the shape of graph.
Draw velocity-time graph to show:
Zero acceleration
Write a sentence to explain the shape of graph.
Figure shows the distance-time graph of three students A, B and C. On the basis of the graph, answer the following :
Which of the three is traveling the fastest?
The area under the v-t graph represents a physical quantity that has the unit.
The area of the velocity-time graph gives the displacement of the body.
An object is moving in a positive direction with positive acceleration. The velocity-time graph with constant acceleration which represents the above situation is:
