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AssignmentMultiple Choice

Angles and Trigonometric Functions

Question 1 • IC Pre-Cal - Deering

An object moves at a constant rate along a circular path with radius 10 inches, and makes 3 revolutions in 2 seconds.What is the linear velocity, in inches per second, of a point on the edge of the wheel?

Answer
A
15π
B
20π
C
30π
D
60π

Explanation

The wheel travels one circumference in each revolution: 2πr = 2π(10) = 20π inches. It makes 3 revolutions in 2 seconds, so its rate is (3 × 20π) ÷ 2 = 30π inches per second. The correct choice is 30π.

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