Question

1
Which of the following situations is
possible?
An object can have
acceleration but constant
velocity
The velocity of an object
may be zero but
acceleration is not zero
Distance and the
magnitude of displacement
are equal in circular motion
Average speed and the
magnitude of average
velocity are always equal in circular motion
​

Answer 1

Answer:

ANSWER

(i) : Net displacement of object moving a uniform circular motion is zero in one revolution but distance covered by it is non zero. Hence statement (i) is not correct.

(ii) : Statement (ii) is correct that average speed is same as instantaneous speed in case if the body moves with uniform speed.

(iii) : If the body is moving in a straight line without reversing its direction, then displacement of body is equal to distance covered by it in the same time. Hence, average speed of body is equal to average velocity of body.

So statement (iii) is false.

(iv) : When a body moves with a constant velocity, this means the body is moving in a straight line and thus displacement of object is non zero. Hence average velocity of object is also non zero.

So statement (iv) is false.

Hence, correct option is option D.

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