what is the net force on charge Q3? what is the sum of the forces on all of the
ID: 1999271 • Letter: W
Question
what is the net force on charge Q3?
what is the sum of the forces on all of the 3 charges?
the answers is just whole numbers, i got 45 for the first one, im stuck! help!!! PLEASE
Three point charges are arranged in a horizontal line as shown below. Find the electric forces (in units of kQ2/R2) on the charges given the following: Q1 =-9 Q, Q2 = 45 Q, Q3 =-72 Q, 3 R, and r2 = 3 R. Remember that a positive force points to the right and a negative force points to the left. 3 What is the force on charge Q1 due to Q2? Submit Answer Tries 0/2 What is the force on charge Q1 due to Q3? Submit Answer Tries 0/2 What is the force on charge Q2 due to Q3? Submit Answer Tries 0/2 What is the force on charge Q2 due to Q1? Submit Answer Tries 0/2 What is the force on charge Q3 due to Q1? Submit Answer Tries 0/2 What is the force on charge Q3 due to Q2? Submit Answer Tries 0/2 What is the net force on charge Q1? Submit Answer Tries 0/2Explanation / Answer
force on charge Q1 due to Q2 = kQ1Q2/r1^2
= (k x 9Q x 45Q) / (3R)^2 = 45 kQ^2 / R^2
Ans. 45
------------------------------
force on Q1 due to Q3, F = kQ1Q3/ (r1+r2)^2
= - (k x 9Q x 72Q) / (6R)^2 = - 18 kQ^2 / R^2
Ans. - 18
---------------------------------------
force on Q2 due to Q3, F = kQ2Q3/ (r2)^2
= (k x 45Q x 72Q) / (3R)^2 = 360 kQ^2 / R^2
Ans. 360
------------------------------
force on Q2 due to Q1, F = kQ1Q2/ (r1)^2
= (k x 9Q x 45Q) / (3R)^2 = - 45 kQ^2 / R^2
Ans. -45
--------------------------------
force on Q3 due to Q1, F = kQ1Q3/ (r1+r2)^2
= (k x 9Q x 72Q) / (6R)^2 = 18 kQ^2 / R^2
Ans. 18
--------------------------------------
force on Q3 due to Q2, F = kQ2Q3/ (r2)^2
= - (k x 45Q x 72Q) / (3R)^2 = - 360 kQ^2 / R^2
Ans. -360
--------------------
net forve on Q1 = 45-18 = 27
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.