Question
Question: A simple pendulum 4 m long swings with an amplitude of 0.2 m. What is its acceleration at the ends o...
A simple pendulum 4 m long swings with an amplitude of 0.2 m. What is its acceleration at the ends of its path ? (g = 10 m/s2)
A
Zero
B
10 m/s2
C
0.5 m/s2
D
2.5 m/s2
Answer
0.5 m/s2
Explanation
Solution
Fig.
T = mg cos θ
∴ Fnet = mg sin θ
and acceleration = g
sin θ = g tan θ
(sin θ = tan θ)
= (10)4(0.2)= 0.5 m/s2