of mass 9.11 x 1031 kg has an Initial speed of 3.15 x 10 m/\'s. It travels in a
ID: 1657533 • Letter: O
Question
of mass 9.11 x 1031 kg has an Initial speed of 3.15 x 10 m/'s. It travels in a straight line, and lits speed (a) Determine the force exerted on the electron. F-3.103-10 Your answer cannot be (b) Compare this force with the weight of the electron, which we neglected. way without per L13.Q of 1.09 m/s A force F applied to an object of mass mi produces an (a) What is the value of the ratio m/m? of 2.74 m/2. The same force applied to the second object of mass m2 produces an (b) If m1 and m2 are combined into one object mi and Enginees way without prior wniten germissice of the pub MacBook AirExplanation / Answer
The work done by the force must equal the kinetic energy increse:
W = F d = 1/2 m (v2² - v1²)
so
F = m (v2² - v1²) / 2 d = 9.11x10^-31 [(6.86x10^5)² - (3.15x10^5)²] / (2x5.45x10^-2) =
= 3.1 x10^-18 N
The weight is
Fg = m g = 9.11x10^-31 x 9.81 = 8.94x10^-30 N
The force ratio is
F/Fg = 3.1x10^-18 / 8.94x10^-30 = 3.47 x10^11
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