An object moves uniformly on a circle of radius 5 m with a period of 10 s. What is its speed?
Answer and explanation
Correct answer: D. m/s
- Step 1: In one period the object covers the circumference .
- Step 2: m/s.
Answer
m/s.
Why not the others: m/s: the factor 2 in is forgotten. m/s: the period is multiplied instead of dividing. m/s: the radius is squared.
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