Three balls A, B and C are kept in a straight line. The separation between A and C is 1 m, and B is placed
at the midpoint between them. The masses of A, B,C
are 100 g, 200 g and 300 g respectively. Find the net
gravitational force on (a) A, (b) B, and (c) C.

A50.0-n box is sliding on a rough horizontal floor, and the only horizontal force acting on it is friction. you observe that at one instant the box is sliding to the right at and that it stops in 2.25 s with uniform acceleration. what magnitude force does friction exert on this box

What is the rate of change in a objects position?

Global warming will produce rising sea levels partly due to melting ice caps but also due to the expansion of water as average ocean temperatures rise. to get some idea of the size of this effect, calculate the change in length of a column of water 1.00 km high for a temperature increase of 1.00ºc. note that this calculation is only approximate because ocean warming is not uniform with depth. (answer in ×10^{-3} −3 m)