Define average velocity and instantaneous velocity. When are they same?

Define: Escape velocity

Distinguish between average velocity and instantaneous velocity. (Any two points) A man throws a ball to maximum horizontal distance of 160m. Calculate the maximum height reached.

Define angular velocity.

Oral work : What is an instantaneous velocity ?

Define the terms. Velocity.

Obtain the relation between escape velocity and critical velocity when satellite is orbiting very close to earth. OR Show//prove that the escape velocity of a satellite orbiting round the earth is equal to sqrt2 time its critical velocity. OR Show that V_e = sqrt2. V_c for a satellite orbiting round the earth.

A ball enters a semicircular tube with velocity v and maintains a constant velocity. Find the average force required to keep the tube stable.

The position of a particle is given by the function s(t)= 2 t^2 + 3t - 4. Find the time t=c in the interval 0 le t le 4 when the instantaneous velocity of the particle equals to its average velocity in this interval.

Define angular velocity . State its unit.