Question

A very large, charged plate floats in deep space. Due to the charge on the plate, a constant electric field E exists everry above the plate. An object with mass m and charge q is shot upward from the plate with a velocity v and at an angle `theta`. It follows the path shown reaching a height h and a ramge R. Assume the effects of gravity to be negligible.

Suppose E is `10 N//C`, m is `1` kg, q is `-1C`, v is `100 m//s` and `theta` is `30^(@)`. What is h?
A. 25 m
B. 45 m
C. 80 m
D. 125 m

Answer 1

Correct Answer - D
`h=(u^(2) sin^(2) theta)/(2a)=(100xx100xx(1/2)^(2))/(2xx(1xx10)/1)=125 m`