A sprinter is running along the circumference of a big sports stadium with constant speed. Which of the following do you think is changing in this case ?
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Its speed(which is a scalar quantity) remain same,while the velocity of the sprinter(which is a vector quantity) keeps changing.
For instance,Its velocity changes because it is a vector quantity,i.e,it depends both upon magnitude and direction. Therefore,when a body is moving in a circular path,its direction changes at every point and its velocity as well.
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Answer:
uniform circular motion
Explanation:
An object moving in a circle is accelerating. Accelerating objects are objects which are changing their velocity, the sprinter is having a uniform circular motion in which the direction of the body is continuously changing. So, the answer is correct.
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