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WASSCE
An electron of mass 9.1 × 10-31 kg moves with a speed of 2.0 × 106 ms-1 round the nucleus of an atom in a circular path of radius 6.1 × 10-11m.
Use the information to answer this question.
Calculate the centripetal force acting on the electron.
A.
7.7 × 10-47 N
B.
6.0 × 10-8 N
C.
3.0 × 10-14 N
D.
1.3 × 10-26 N
Answer: B
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