Motion in a Str...

Which of the following statements are incorrect?
(i) Average velocity is path length divided by time interval.
(ii) In general, speed is greater than the magnitude of the velocity.
(iii) A particle moving in a given direction with a non-zero velocity can have zero speed.
(iv) The magnitude of average velocity is the average speed.

A car is moving along a straight line OP as shown in the figure. It moves from O to P in 18 s and returns from P to Q in 6 s. Which of the following statements is not correct regarding the motion of the car? 

The area under velocity-time graph for a particle in a given interval of time represents

A cyclist moving on a circular track of radius 40m completes half a revolution in 40s. Its average velocity is

The position of an object moving along x-axis is given by x = a + bt² , where a = 8.5 m and b = 2.5 m s⁻² and t is measured in seconds. The average velocity of the object between t = 2 s and t = 4 s is