(a) Find the magnitude of the acceleration ofthe proton. 1m/s 2 (b) How long doe

Question

(a) Find the magnitude of the acceleration ofthe proton.
1m/s2
(b) How long does it take the proton to reach this speed?
2 µs
(c) How far has it moved in that interval?
3 m
(d) What is its kinetic energy at the later time?
4 J (a) when the electric field is perpendicular tothe surface
1 N·m2/C
(b) when the electric field is parallel to the surface
2 N·m2/C

Explanation / Answer

force = q*E = 1.6x10^-19 C*315N/C = 5 x 10^-17 N Now F = ma --> a = F/m = 5x10^-17/(9.11x10^-31 kg) = 5.5x10^13m/s^2 Equation of motion is v = v0 + at and v0 = 0 v = 5.5x10^13 m/s^2 *0.90x10^-8 s = 4.95x10^5 m/s

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