Answer:
Explanation:
Force between two charges can be expressed as follows
F = k q₁ q₂ / d²
q₁ and q₂ are two charges , d is distance between them , k is a constant whose value is 9 x 10⁹
distance between charges is fixed which is 4 -2 = 2 cm = 2 x 10⁻² m
force between 1μC and 4μC
= 9 x 10⁹ x 1 x 4 x 10⁻¹² / ( 2 x 10⁻² )²
= 9 x 10 = 90 N
force between 4μC and 1μC
= 9 x 10⁹ x 4 x 1 x 10⁻¹² / ( 2 x 10⁻² )²
= 9 x 10 = 90 N
force between 2μC and 2μC
= 9 x 10⁹ x 2 x 2 x 10⁻¹² / ( 2 x 10⁻² )²
= 9 x 10 = 90 N
force between 1μC and 2μC
= 9 x 10⁹ x 1 x 2 x 10⁻¹² / ( 2 x 10⁻² )²
= 4.5 x 10 = 45 N
force between 1μC and 8μC
= 9 x 10⁹ x 1 x 8 x 10⁻¹² / ( 2 x 10⁻² )²
= 18 x 10 = 180 N
force between 2μC and 8μC
= 9 x 10⁹ x 1 x 8 x 10⁻¹² / ( 2 x 10⁻² )²
= 36 x 10 = 360 N
Left Charge Right Charge Resulting force(N)
1μC 4μC 90 N
4μC 1μC 90 N
2μC 2μC 90 N
1μC 2μC 45 N
1μC 8μC 180 N
2μC 8μC 360 N
is the gravitational acceleration. As we can see, the period of a simple pendulum depends only on its length.