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Tuesday, September 15, 2015

Mark scheme for conical Pendulum

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

3