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प्रश्न
When is the negative acceleration?
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उत्तर
When the velocity of a body decreases with time, then the acceleration of the body is said to be negative acceleration.
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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.
What term is used to denote the change of velocity with time ?
Name the quantity which is measured by the area occupied under the velocity-time graph.
A train travelling at 20 m s-1 accelerates at 0.5 m s-2 for 30 s. How far will it travel in this time ?
Differentiate between uniform acceleration and variable acceleration.
A body starts from rest and acquires a velocity 10 m s-1 in 2 s. Find the acceleration.
State how the velocity-time graph can be used to find
The acceleration of a body
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.
Multiple choice Question. Select the correct option.
At the maximum height, a body thrown vertically upwards has :
When will you say a body is at uniform acceleration?
