Your? Answer is partially correct. Try again. An electron is a subatomic partide

Question

Your? Answer is partially correct. Try again. An electron is a subatomic partide (m 9.11 Times 10 ^-31 kg) that is subject to electric forces. An electron moving in the +x direction accelerates from an initial velocity of +7.00 Times 10^5 m/s to a final velocity of 2.05 Times 10^6 m/s while traveling a distance of 0.0658 m. The electron's acceleration is due to two electric forces parallel to the x axis: F1=7.17 Times l0^-17 N, and F2 , which points in the -x direction. Find the magnitudes of the net force acting on the electron and the electric force F2.

Explanation / Answer

Given that

Mass of the electron (m) =9.11*10-31kg

we know that the from the equation of motion

v2 =u2+2as

a =v2-u2/2s =(2.05*106)2 -(7*105)2/2*0.0658 =371.25*1010/0.1316 =2.821*1013m/s2

now from the newton second law

Net force =ma=(9.11*10-31)(2.821*1013m/s2) =25.699*10-18=2.5699*10-17N

Now the total force Fnet =F1+F2

F2 =Fnet -F1 =2.5699*10-17N-7.17*10-17N =-4.60*10-17N

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