A pendulum 3.0 m long is oscillating through a maximum angle of 4.8°. What is its speed when the angle is 2.4°?
A)0.45 m/s
B)26 m/s
C)23 m/s
D)3.0 m/s
E)0.39 m/s

Question

Quizplus · Accepted Answer

The correct answer is E.The speed of a pendulum is given by the equation:v = sqrt(2gl(1-cos(theta)))where:v is the speed of the pendulumg is the acceleration due to gravity (9.8 m/s^2)l is the length of the pendulum (3.0 m)theta is the angle of the pendulum (2.4°)Plugging in the given values, we get:v = sqrt(2 * 9.8 m/s^2 * 3.0 m * (1-cos(2.4°))) = 0.39 m/s

A Pendulum 3