Two charges of # 5# # C # and # -1# # C# are positioned on a line at points # -2 # and # 1 #, respectively. What is the net force on a charge of # 1# #C# at # -1 #?
1 Answer
Explanation:
If we imagine the situation (or, better, draw a large, clear, labeled diagram!) we know that the
(We were not told the units of distance on the line but we need to assume it was
It's also worth realising that the force on the
For the
(if we drew our number line in the usual left-to-right direction, this force is acting to the right)
For the
The net force is simply the sum of these two forces: