Question 98)
Part 1)
A charged cloud system produces an electric field in the airnear Earth's surface. A particle of charge -2.1 × 10-9 Cis acted on by a downward electrostatic force of 4.0 ×10-6 N when placed in this field. (a)What is the magnitude of the electric field? (b)What is the magnitude of the electrostatic force on a proton placedin this field? (c) What is the gravitational forceon the proton? (d) What is the ratio of theelectrostatic force to the gravitational force in this case?
Part 2)
A block with a mass of 11.1 g and a charge of +6.70 ×10-5 C is placed in an electric field with xcomponent Ex = 2.77 × 103 N/C,y component Ey = -728 N/C, andz component Ez = 0.(a) What is the magnitude of the electrostaticforce on the block and (b) what angle does thatforce make with the positive x direction? If the block isreleased from rest at the origin at time t = 0, what areits (c) x and (d)y coordinates at t = 2.80 s?
Part 3)
An electron is shot at an initial speed ofv0 = 4.62 × 106 m/s, at angleθ0 = 40.9 ˚ from an x axis. It moves through auniform electric field E→ = (5.40 N/C)j→. A screen for detectingelectrons is positioned parallel to the y axis, atdistance x = 1.84 m. What is the y component ofthe electron's velocity (sign included) when the electron hits thescreen?
