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in Trigonometry by (46.9k points)
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A wheel is spinning at 2 radians/second. How many seconds will it take to make 10 complete rotations? 

(a) 10π seconds 

(b) 20π seconds

(c) 5π seconds 

(d) 15π seconds

1 Answer

+1 vote
by (49.1k points)
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Best answer

(a) 10π seconds

1 rotation makes 2π 

Distance travelled in 1 second = 2 radians 

So time taken to complete 10 rotations = 10 × 2π = 20 πc 

= 20π/2 = 10π seconds

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