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प्रश्न
What do you mean by constant acceleration?
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उत्तर
A body is said to have constant acceleration, if it travels is a straight line and its velocity increases or decreases by equal magnitude in equal intervals of time.
Ex: the motion of a freely falling body.
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संबंधित प्रश्न
Define acceleration. State its unit.
Distinguish between acceleration and retardation.
A bullet initially moving with a velocity 20 m/s strikes a target and comes to rest after penetrating a distance 10 cm into the target. Calculate the retardation caused by the target.
Draw velocity – time graph for the following situation:
When a body is moving with variable velocity, but uniform retardation.
From the diagram given below, calculate acceleration.
From the diagram given below, calculate deceleration.
Diagram is given below shows velocity – time graph of car P and Q, starting from the same place and in the same direction. Calculate the Acceleration of car P.
The acceleration of a moving body is constant in magnitude and direction. Must the path of the body be a straight line?
If not, given an example.
A body falls towards the earth. Does it have positive or negative acceleration?
The speed of a car increases from 10 km/h to 64 km/h in 10 seconds. What will be its acceleration?
Convert the following acceleration:
1/36 m/s2 into km/h2
The graph shows how the velocity of a scooter varies with time in 50 s.
Work out: Acceleration.
Exercise Problem.
A racing car has a uniform acceleration of 4 ms–2. What distance it covers in 10 s after the start?
When a body starts from rest, the acceleration of the body after 2 seconds in ______ of its displacement.
m/s2 is the unit of ______.
Acceleration is defined as the rate of change of ______.
It is possible to have objects moving with uniform speed but variable acceleration.
Assertion: When a body is subjected to a uniform acceleration, it is always moving in a straight line.
Reason: Motion may be straight-line motion or circular motion.
