Velocity of a body reaching the point from which it was projected upwards is

Does the escape speed of a body from the earth depend on:- the location from where it is projected,

A ball is projected from O with an intial velocity 700 cm/s in a direction 37^@ above the horizotal. A ball B, 500 cm away from O on the line of the intial velocity of A, is released from rest at the instant A is projected. Find the direction and magnitude of the velocity A at the time of impact. [given g = 10m//s^2, sin37^@ = 0.6 and cos37^@ = 0.8]

What will be the sign of the velocity of the point P', which is the projection of the velocity of the referenc particle P. P is moving in a circle of radius R in anticlockwise direction.

A particle is projected with a given velocity in two possible ways so as to make it pass through a point at a distant from the point of projection.Obtain a relation for the product of times taken to reach the point in the two possible ways.

A projectile is fired at an angle of 45^@ with the horizontal.Elevation angle of the projectile at its highest piont as seen from the point of projection is :