Average Velocity & Speed

Unspecified year 5 questions

1. In 1.0 s, a particle goes from point A to point B, moving in a semicircle of radius 1.0 m (see Figure). The magnitude of the average velocity is [add image]
2. A body moves in straight line with velocity $v_{1}$ for $1/3rd$ time and for remaining time with $v_{2}$. Find average velocity.
3. A particle moves in straight line with velocity $6 m/s$ and $3 m/s$ for time intervals which are in ratio 1:2. Find average velocity.
4. A man leaves his house for a cycle ride. He comes back to his house after half-an-hour after covering a distance of one km. What is his average velocity for the ride?
5. A point traversed half of the distance with a velocity $v_{0}$. The half of remaining part of the distance was covered with velocity $v_{1}$ & second half of remaining part by $v_{2}$ velocity. The mean velocity of the point, averaged over the whole time of motion is