A particle moves in accordance with the equation r = t² + t and θ = 1/6t³ where t denotes the time in seconds, θ is in radians and r is in meters. Find the speed when t = 2 sec.  A. 12 m/s c. 5 m/s  B. 11 m/s d. 13 m/s

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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.