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प्रश्न
Give one example of following motion :
Variable velocity
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उत्तर
Example of variable velocity: A ball dropped from some height is an example of variable velocity.
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संबंधित प्रश्न
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.
A train travels the first 15 km at a uniform speed of 30 km/h; the next 75 km at a uniform speed of 50 km/h; and the last 10 km at a uniform speed of 20 km/h. Calculate the average speed for the entire train journey.
A car is moving along a straight road at a steady speed. It travels 150 m in 5 seconds:
How far does it travel in 6 seconds ?
Give one example of a motion where an object does not change its speed but its direction of motion changes continuously.
The tip of seconds’ hand of a dock takes 60 seconds to move once on the circular dial of the clock. If the radius of the dial of the clock be 10.5 cm, calculate the speed of the tip of the seconds’ hand of the clock. `("Given" π= 22/7)`.
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.
One of the following is not a vector quantity. This one is :
The speed of a car is 72 km h-1. Express it in m s-1.
