Questions
A particle moves along a horizontal circle with constant speed. If 'a' is its acceleration and 'E' is its kinetic energy
A) a is constant B) E is constant C) a is variable D) E is variable
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Correct option is D
Speed (u) is constant.: E = 1/2 m u2 = constantAgain 'a' is always directed towards the centre of the circular path. As the particle changes its position ,direction of 'a' also changes. Therefore Option-(4) is correct.Similar Questions
A particle goes round a circular path with uniform velocity v. After describing half the circle, the average acceleration of the particle (if its radius is r) is
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