Which of the following is not correct for uniform circular motion? a) The speed remains constant. (b) The acceleration acts along the radius and is directed towards the centre. (c) The velocity changes at every instant. (d) The direction remains constant all through out.
Answers
Answer:
d) the direction remains constant all throught out is incorrect because direction can change at every instant
Answer:
The incorrect statement about uniform circular motion among these is Option D : Direction remains constant throughout.
Explanation:
Uniform circular motion : A circular motion is described as a body movement that takes a circular path. The motion of a body travelling at a constant speed along a circular path is known as uniform circular motion. The velocity varies, while the speed remains constant.
From the above definition, we can understand that Option A and Option C are correct statements.
If a particle is travelling in a circle, it must be experiencing some acceleration towards the centre, causing it to rotate around the centre. Because this acceleration is always perpendicular to a particle's velocity, it simply alters the direction of velocity rather than the magnitude, resulting in uniform circular motion.
The force acting towards the centre is called centripetal force, and the acceleration is known as centripetal acceleration (or radial acceleration).
From this statement, we can understand that Option B is also true.
We can see that direction changes throughout and hence, Option D is incorrect.