Physics problem

Question

A meson, a subatomic particle having a mass 250 times that of an electron, is shot with a constant speed of 5.00 x 10⁶ m/s into a region where an electric field causes a deceleration of 1.25 x 10¹⁴ m/s².



(a) How far does the meason travel before coming to rest? (3 marks)

(b) How long does it take the meson to come to rest? (2 marks)

Answer 1

Mass of meson = 250m

m is massif electron

a= - 1.25x 10^14

vi =5x10^6

vf = 0

use vf^2 = 0 = (5x10^6)^2=2x1.25x10^14xD

Find D from here

For time taken to come to rest

vf =0 = vi- 1.25x10^14xt

plug in vi= 5x10^6

and find t