An object moving upward cannot be considered free-falling a.Sometimes true b.Always false c.Sometimes fals d.Always true What refers to the force perpendicular to the velocity of an object moving along a curved path?a.Centrifugal force b.Reverse-effective force c. Centripetal force d. Normal force A uniform bar of mass m is supported by a pivot at its top, about which the bar can swing like a pendulum. If a force F is applied perpendicularly to the lower end of the bar as in the diagram, how big must F be in order to hold the bar in equilibrium at an angle θ from the vertical? a.(mg/2) sin (θ)b.(mg/2) cos (θ)c.2mg cos (θ)d.mg sin (θ)e.2mg sin (θ)

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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.