A person covers half a round on a circular track of radius 20m with constant speed v in `pi` sec then which of the following is/are correct.
(a)Displacement covered is zero

(b)Magnitude of change in velocity of a person is 2v

(c)The average speed of a person is 20m/sec

(d)The average acceleration of a person is equal to zero

A person moves on a semicircular track of radius 40 m. If he starts at one end of the track and reaches the other end, find the distance covered and magnitude of displacement of the person.

A cyclist moving an a circular track of radius 50 m completes one revolution in 2 minutes . What is his (i) distance covered (ii) dislacement (iii) average speed (iv) average velocity, in one full revolution.

A particle moves on circular path of radius 5 m with constant speed 5 m/s. Find the magnitude of its average acceleration when it completes half revolution.

A cyclist moves along a circular path of radius 70 m. If he completes one round in 11 s, calculate (i) total length of path, (ii) magnitude of the displacement, (iii) average speed, and (iv) magnitude of average velocity.

A car has a linear velocity v on a circular track of radius r. IF its speed is increasing at a rate of a m//s^(2) , , then its resultant acceleration will be

A particle starts moving on a circular track of radius (20)/(pi) m from point A with a uniform speed of 20 m//s . It reaches to point B after some time. Find : (a) Distance travelled by particle from A to B and its displaement for the same duration. (b) Find the average speed, average velocity and average acceleration from A to B

A person moves on a semi - circular track of radius radius 42 m during a morning walk. He starts at one end of the track and reaches the other end. Find the distance covered and the displacment of the person .

A particle moves in circle of radius R with a constant speed v. Then, find the magnitude of average acceleration during a time interval (pi R)/(2v) .

A man starts running with constant speed along a circular path of radius sqrt2m He completes two rounds in 16 seconds. The magnitude of the average velocity in first 2 seconds is