Please answer question and just send me the paper solutions asap dont type the answer question 4 only And use the formula that is given dont use any other formula and use 9.81 for acceleration not 9.8 if required please solve it faster asap

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Centripetal Force

A particle, body, object or certain mass while travelling in a rotational path or semicircular path, experiences an inertia force. If that inertia force pulls the towards the inward of the imaginary circle in the rotation, it is termed as centripetal force.