A SIMPLE PENDULUM OF LENGTH 0.4m HAS A PERIOD OF 2s. WHAT IS THE PERIOD OF A SIMILAR PENDULUM OF LENGTH 0.8m AT THE SAME PLACE
February 7, 2024
- A. 8s
- B. 4s
- C. 2√2s
- D. √2s
The answer to the question is: C. 2√2s
The period of a simple pendulum is given by the formula:
T = 2π√(L/g)
Where T is the period, L is the length of the pendulum, and g is the acceleration due to gravity.
Given that the length L1 = 0.4m and T1 = 2s, we can find g:
T1 = 2π√L1/g
T1 = 2π√0.4/g
2 = 2π√0.4/g
1 = π√0.4/g
1/π = √0.4/g
1/π² = 0.4/g
0.4/g = 1/π²
g = 0.4π² m/s²
Now, for the second pendulum with length L2 = 0.8m, we can find its period T2:
T2 = 2π√L2/g
T2 = 2π√0.8/g
T2 = 2π√0.8/0.4π²
T2 = 2π√2/π²
T2 = 2π√2/√π²
T2 = 2π√2 ÷ π
T2 = 2√2 s.