Need help on Part (h) and (g) Class Management I Help Homework 2 Begin Date: 1/2

Question

Need help on Part (h) and (g)

Class Management I Help Homework 2 Begin Date: 1/22/2017 12:00:00 AM Due Date: 1/30/2017 11:59:00 PM End Date: 1/30/2017 11:59:00 PM (8%) Problem 10: A ball with charge q 15 HC and mass m 0.065 kg is hung down from the ceiling by a string with length L m. A uniform electric field E perpendicular to the string with a magnitude of 500 V/m is applied to the ball-string system. The ball then begins to move. Ignore the air resistance. Otheexpertta.com 13 Part (a) Suppose point B is the highest point the ball can reach. Take as the angle of the string with the vertical direction at point B. Write the equation of the change of the gravitational potential energy 4Ug from point A to point B in terms of symbols given. 13% Part (b) What's the change of the electrical potential energy 4Ue from point A to point B in terms of symbols given 13% Part (c) Select the correct equation of angle 0 based on equations in Part (a) and Part (b) 13% Part (d) Solve for the numerical value of 0. The units of 6 are degrees Suppose point C is the point where the ball reaches its highest velocity, and a is the angle of the string at point C. Which of 13 Part (e) the free body diagrams below for the ball is correct? i 13 Part (f Write an equation for the sum of forces in the direction of motion of the ball when it is at location C. Assume counterclockwise is positive. 13% Part (g Write an equation for tan(a) in terms of the symbols given Grade Summary tan(a) Deductions 0% 100% Potential

Explanation / Answer

F).

T.sin a = q*E

T.cos a = m*g

G).

Highest velocity , equilibrium position

T.sin a/T.cos a = q*E/m*g

Tan a = q*E/m*g

H).

Tan a = ((15*10^-6)*500)/(0.065*9.8)

a = 0.6743 degree

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