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प्रश्न
What do you understand by the term acceleration?
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उत्तर
“Rate of change of velocity with respect to time is called acceleration.” S.I. unit of acceleration is ms−2.
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संबंधित प्रश्न
A train starting from a railway station and moving with uniform acceleration attains a speed 40 km h−1 in 10 minutes. Find its acceleration.
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.
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 :
Which of the following could not be a unit of acceleration?
The slope of a speed-time graph gives:
Define velocity. State its unit.
The figure shows the displacement - time graph for four bodies A, B C and D. In each case state what information do you get about the acceleration (zero, positive or negative).
Derive the following equations for uniformly accelerated motion:
(i) v = u + at
(ii) `"S = ut" + 1/2 "at"^2`
(iii) v2 = u2 + 2aS
where the symbols have their usual meanings.
Can you suggest a real-life example about the motion of a body from the following velocity – time graph?
