Question

Which of the following situations is possible?


(a) An object can have acceleration, but constant velocity.


(b) The velocity of an object may be zero but acceleration is not zero.


(c) Distance and the magnitude of displacement are equal in circular motion.


(d) Average speed and the magnitude of average velocity are always equal in circular motion.
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Answer 1

Answer:

The correct option is D.

Explanation:

• It is not possible that an object accelerates but has a constant velocity
• The change in velocity per unit time is acceleration
• If there is any magnitude of acceleration, the velocity of an object cannot be zero
• In a circular motion, the distance and magnitude of displacement are never equal.
• For example, when the object's initial point is diametrically opposite to its final point, the distance covered is πR, where R is the radius of the circle, but the displacement is 2R.
• The displacement is the shortest path between the initial and final point of an object
• It is true that the magnitude of average velocity and average speed is always equal in a circular motion.

The magnitude of average velocity and average speed is always equal in a circular motion.

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Answer 2

Answer:

Correct option is D.

Explanation:

An object never accelerates, but its velocity is constant

Change in velocity per unit time is called acceleration .

If an object has acceleration, its velocity cannot be zero

In circular motion, displacement distance and magnitude are never equal.

For example, if the starting point of the object is directly opposite the ending point, its displacement is πR (where R is the radius of the circle), but the displacement is 2R.

Displacement is the shortest path between the starting and ending points of an object

It is true that in circular motion the average speed and the magnitude of the average speed are always equal.

In circular motion, the average velocity and the magnitude of the average velocity are always equal.

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