Find the magnitude of the gravitational force acting on a particle of mass 2kg placed at the origin.
The gravitational potential in a region is given by V=20Nkg−1 (x + Y). (a) show that the equation is dimensionally correct. (b) Find the gravitational field at the point (x,y), Leave your answer in terms of the unit vectors →i,→j,→K. N kg−1 (c) Calculate the magnitude of the gravitational force on a particle of mass 500 g placed at the origin.
The magnitude of force needed to produce an acceleration of 4 ms−2 in a ball of mass 6 kg is