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a).When a bus goes round a bend on a flat road, it experiences a centripetal force. State what provides the centripetal force.
b).State the purpose of banking roads at the bends.
c).A student whirls a stone of mass 0.2Kg tied to a string of length 0.4m in a vertical plane at a constant speed of 2 revolutions per second.(Take
acceleration due to gravity, #g= 10ms^2# )
i) State two forces acting on the stone when it is at the highest point.
ii) Determine; I.Angular velocity of the stone. II. Tension in the string when the stone is at the highest point.