presented by Sapling Learning A boy swings a ball on a string at constant speed

Question

presented by Sapling Learning A boy swings a ball on a string at constant speed in a horizontal circle that has a circumference equal to 6 m. What is the work done on the ball by the 10-N tension force in the string during one revolution of the ball? O 190 J O 15J O 60J O 30 J 0J Incorrect What is the angle between the force and velocity for circular motion? What is the cosine of that angle? In order for the amount of work done to be 30 J, the angle between force and velocity would have to be 60

Explanation / Answer

zero joules ( last option)

since tension is always perpendicular to velocity work done is zero

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