A particle moves in a circular path with a uniform speed. Its motion is (a) periodic

Let AB = x, So t 1=x /30, and t2 =  x /20  Total time = t1 + t2 = 5x / 60  h.    Average speed for entire journeyTotal distance /Total...

(d) its velocity and acceleration both change.

(b) The magnitude of the frictional force on the car is greater than mv2/r  (c) The friction coefficient between the ground and the car is not less than α/g.  Explanation:  Since the circular...

(c) simple harmonic with amplitude √(A2+B2)

(a) periodic

(d) none of them. EXPLANATION:   Though the particle repeats its motion but not at a regular interval (Since the speed is continuously increasing), so (a) is not true.  (b) and (c) are...

(iii) Elongated path

(d) a helix with nonuniform pitch.

(d) its velocity and acceleration both change. Explanation: Velocity and acceleration are both vectors and a vectors is fully defined with its magnitude and direction. Even when one entity changes, the vector...

(b) A body moving with a uniform angular velocity ω on a circular path of radius r has radial acceleration equal ω2r directed towards the centre of the path.