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प्रश्न
What is the Differnece between speed and velocity ?
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उत्तर
(i) Speed is a scalar quantity, whereas velocity is a vector quantity.
(ii) Speed of a body is the distance travelled by it per unit time, whereas the velocity of a body is the distance travelled by it per unit time in a given direction.
(iii) Speed is always positive, while velocity can be both positive and negative, depending upon the direction.
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संबंधित प्रश्न
Change the speed of 6 m/s into km/h.
What name is given to the speed in a specified direction ?
State whether speed is a scalar or a vector quantity. Give reason for your choice.
Convert a speed of 54 km/h into m/s.
A car is moving along a straight road at a steady speed. It travels 150 m in 5 seconds:
How long does it take to travel 240 m ?
The graph given alongside shows how the speed of a car changes with time:
(i) What is the initial speed of the car ?
(ii) What is the maximum speed attained by the car ?
(iii) Which part of the graph shows zero acceleration ?
(iv) Which part of the graph shows varying retardation ?
(v) Find the distance travelled in first 8 hours.
Which of the following can sometimes be 'zero' for a moving body?
(i) average velocity
(ii) distance travelled
(iii) average speed
(iv) displacement
When is a body said to be in motion?
A car moving on a straight path covers a distance of 1 km due east in 100 s. What is the speed of the car?
Define average velocity and give one example.
