Physics

Physics

Problem

Charges

q_1=+3\,\mu\text{C}

at

P(-2\,\text{cm},1\,\text{cm},0)

and

q_2=-6\,\mu\text{C}

at

Q(1\,\text{cm},-3\,\text{cm},2\,\text{cm})

are in vacuum. (i) Determine the unit vector

\hat{\mathbf r}_{21}

from

q_2

to

q_1

. (ii) Obtain the force

\mathbf F_{12}

on

q_1

due to

q_2

in vector form. (iii) Hence write

\mathbf F_{21}

and verify the relationship between

\mathbf F_{12}

and

\mathbf F_{21}

. a. Determine the unit vector

\hat{\mathbf r}_{21}

from

q_2

to

q_1

. b. Obtain the force

\mathbf F_{12}

on

q_1

due to

q_2

in vector form. c. Hence write

\mathbf F_{21}

and verify the relationship between

\mathbf F_{12}

and

\mathbf F_{21}

.

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