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Wednesday, September 12, 2018

Circular motion Answers



Q=It


1.       36C
2.       500s
3.       12A
4.       66 weeks
5.       (i)190mA  (ii) 27 000 C

Tuesday, September 11, 2018

Stone on String




Conical Pendulum


1 Explanation
There is a resultant (or net or unbalanced) force
ô€€¹
Plus any 3 of following:-
Direction of motion is changing ô€€¹
Velocity is changing ô€€¹
Velocity change implies acceleration ô€€¹
Force produces acceleration by F = ma (or N2) ô€€¹
Force (or acceleration) is towards centre / there is a centripetal
force (or acceleration) / no force (or acceleration) parallel to
motion
ô€€¹
No work done, so speed is constant ô€€¹ Max
3