A body moves in SHM between two point 20m on the straight line Joining the points. If the angular speed of the body is 5 rad/s. Calculate its speed when it is 6m from the center of the motion.
-
A.
20 m/s -
B.
30 m/s -
C.
40 m/s -
D.
50 m/s
Correct Answer: Option C
Explanation
From two parts 20m apart
a = 10m, x = 6m, A = 5
V = ω(sqrt{A^2 – X^2}) = 5(sqrt{10^2 – 6^2}) = 40m/s
There is an explanation video available below.