Two charged objects exert a 4.4-N force on each other when separated by 0.90 m .

Question

Two charged objects exert a 4.4-N force on each other when separated by 0.90 m . Part A Find the product of the two charges. Express your answer using two significant figures. |q1||q2| = C2

Part B Determine the force that one charged object exerts on the other when the separation is doubled. Express your answer to two significant figures and include the appropriate units.

Part C Determine the force that one charged object exerts on the other when the separation is reduced by one-half. Express your answer to two significant figures and include the appropriate units. Fq1onq2 =

Part D Determine the force that one charged object exerts on the other when the magnitude of one charge is reduced by one-half. Express your answer to two significant figures and include the appropriate units. Fq1onq2 =

Part E Determine the force that one charged object exerts on the other when both charges are doubled. Express your answer to two significant figures and include the appropriate units.

Explanation / Answer

A)
F = K*|q1||q2|/r^2
4.4 = 9*10^9 * |q1||q2| / 0.90^2
|q1||q2| = 3.96*10^-10 C^2

B)
When r doubles, F will become 1/4 of previous value
F = 1/4 * 4.4 N
    = 1.1 N

C)
When r is halved, F will become 4 times of previous value
F = 4 * 4.4 N
    = 17.6 N

D)
When q1 becomes half, force will become half
F = 1/2*4.4
    =2.2 N

E)
when q1 and q2 both doubles, force become 4 times
F = 4*4.4
   = 17.6 N

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