Realistic scenario of projectile motion

Asun-sized star will spend most of its lifetime as a: white dwarf red giant protostar main-sequence star

Determine the maximum r-value of the polar equation r =3+3 cos 0

Asmall object with mass 0.200 kg swings back and forth on the lower end of a light rope that is 3.00 m long. the upper end of the rope is attached to the ceiling. as the object swings through its lowest position, where the rope is vertical, the speed of the object is 5.80 m/s. at this point in the motion, what is the tension in the rope? (use g = 9.80 m/s2.)