The wheels on the bus go round and round, but can you name all the forces in a rotating reference frame? Learn to derive these and more through sheer force of reason in Circular Motion.

A bike moves at a rate of \(\si{18\ \kilo\meter/\hour}\). The rear tire has a diameter of \(\si{70\ \centi\meter}\) and has a toothwheel of diameter \(\si{7\ \centi\meter}\). The sprocket (the gear that's turned by the pedals) has diameter \(\si{20\ \centi\meter}\). Both gears are connected by the chain and there is no slippage between the chain and either gear. Under these conditions, how many times do the pedals revolve per minute?

In this matter, assume \(\pi = 3\).

a) The magnitude of the tensile force \(T\) is greater than that of the gravitational force \(mg\).

b) If we cut off the string right at this moment, then the pendulum will move as if it is thrown to the \(x\) direction.

c) The direction of the net force acting on the pendulum is the \(y\) direction.

The tip of the minute hand of which clock will move with greater **speed**?

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