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प्रश्न
If the displacement of an object is proportional to the square of time, then the object is moving with :
विकल्प
uniform velocity
uniform acceleration
increasing acceleration
decreasing acceleration
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उत्तर
uniform acceleration
We are given with the relationship that,
x = kt2
Differentiating it twice we get,
v = 2kt
a = 2k
Where,
v - velocity
a - acceleration
So, the answer is
(b) Uniform acceleration
संबंधित प्रश्न
What information about the motion of a body are obtained from the displacement-time graph?
A bird sitting on a wire, flies, circles around and comes back to its perch. Explain the total distance it traversed during its flight and its eventual displacement.
Define Displacement.
A racehorse runs straight towards the north and covers 540 m in one minute. Calculate
- displacement of the horse,
- its velocity in (a) ms−1 (b) kmh−1.
Under what condition is the displacement of a body equal to the distance traveled by it?
A body is moving along a circular path of radius r. What will be the distance and displacement of the body when it completes:
Two full revolutions
A particle is moving in a circular path of radius r. The displacement after half a circle would be
State whether true or false. If false, correct the statement.
Distance covered by a particle never becomes zero but displacement becomes zero.
Assertion: Displacement of a body may be zero when distance travelled by it is not zero.
Reason: The displacement is the shortest distance between initial and final position.
Which of the following is correct?
