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प्रश्न
Fill in the following blank with suitable word :
If a body moves with uniform velocity, its acceleration is ..............
उत्तर
If a body moves with uniform velocity, its acceleration is zero .
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संबंधित प्रश्न
A bus decreases its speed from 80 km h−1 to 60 km h−1 in 5 s. Find the acceleration of the bus.
Which of the two can be zero under certain conditions : average speed of a moving body or average velocity of a moving body ?
Give one example of a situation in which a body has a certain average speed but its average velocity is zero.
What conclusion can you draw about the velocity of a body from the displacement-time graph shown below :
Name the quantity which is measured by the area occupied under the velocity-time graph.
A bus was moving with a speed of 54 km/h. On applying brakes it stopped in 8 seconds. Calculate the acceleration.
Derive the formula : v = u + at, where the symbols have usual meanings.
When a car driver travelling at a speed of 10 m/s applies brakes and brings the car to rest in 20 s, then retardation will be :
A bus increases its speed from 36 km/h to 72 km/h in 10 seconds. Its acceleration is :
A girl walks along a straight path to drop a letter in the letterbox and comes back to her initial position. Her displacement–time graph is shown in Fig.8.4. Plot a velocity-time graph for the same.
