VIVA LTE 12:46 PM @ * 44% .D. a session.masteringphysics.com C Ch23 Item 3 A sma

Question

VIVA LTE 12:46 PM @ * 44% .D. a session.masteringphysics.com C Ch23 Item 3 A small particle has charge-4.40 C and mass 2.80x10-kg . It moves from point A, where the electric potential is VA-150 V , to point B, where the electric potential VB 900 V is greater than the potential at point A. The electric force is the only force acting on the particle. The particle has a speed of 5.90 m/s at point A Part A What is its speed at point B m/s Part B Is it moving faster or slower at B than at A? Request Answer Provide Feedback

Explanation / Answer

a)

By COnservation of energy

qVA+(1/2)mvA2 =qVB+(1/2)mvB2

-4.4*10-6*(150-900) +(1/2)*(2.8*10-4)*5.92 =(1/2)*(2.8*10-4)*vB2

vB=7.64 m/s

b)

Faster

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