Calculus Question

Question

Given s = rθ. The end of a 30-inch pendulum describes an arc of 5 inches. Through what angle, in radians, does the pendulum swing? What is the correct second step?

a. 5=30θ

b. 30=5θ

c. 5 = θ/30

d. 30 = θ/5

Answer 1

s = rθ ⇒

θ = s/r = (5 in) / (30 in) = 1/6 radians

Answer 2

S=r theta, S=5, r=30

5=30theta

Answer is A

theta =5/30 = 1/6