One end of a cord is fixed and a small 0.390 -kg object is attached to the other

Question

One end of a cord is fixed and a small 0.390-kg object is attached to the other end, where it swings in a section of a vertical circle of radius 3.00 m as shown in the figure below. When = 25.0°, the speed of the object is 8.50 m/s. At this instant, find each of the following.

(c) the total acceleration
atotal = _______ m/s2 inward and below the cord at 5 °

(d) Is your answer changed if the object is swinging down toward its lowest point instead of swinging up?

____ YES   or   ____ NO

(e) Explain your answer to part (d). (SHORT EXPLANATION PLEASE I JUST DON'T UNDERSTAND, THANKS! :)

Explanation / Answer

a_total=sqrt(a_t^2+a_r^2)=391.89 m/s^2 d)NO,the only thing changes is velocity.force of gravity is still mg and radial accel is still mv^2/r radially inward.so no change in any calculation.

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