PLEASE SHOW ALL FORMULAS USED AND WORK 1. In an electricity experiment, a 1.0 g

Question

PLEASE SHOW ALL FORMULAS USED AND WORK

1. In an electricity experiment, a 1.0 g plastic ball is suspended on a 60-cm long string and given an electric charge. A charged rod brought near the ball exerts a horizontal electric force Felec on it, causing the ball to swing out to a 20° angle and remain there.

a. What is the magnitude of Felec?

b. Calculate the normal force on the mass mass m1 from the slanted surface.

In an electricity experiment, a 1.0 g plastic ball is suspended on a 60-cm long string and given an electric charge. A charged rod brought near the ball exerts a horizontal electric force Felec on it, causing the ball to swing out to a 20Â angle and remain there. What is the magnitude of Felec? Calculate the normal force on the mass mass m1 from the slanted surface.

Explanation / Answer

Here

Let T be the Tension

Therefore

TCos(theta) = mg

TSin(theta) = qE

Therefore

tan(theta) = qE/mg

tan(20 degree) = F/(10^-3*9.8)

F = 3.567*10^-3 N

Normal Force = TCos(theta)

= mg

= 10^-3*9.8

= 9.8*10^-3 N

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