1. A 2575 kg demolition ball swings from the end of a crane, The length of the s

Question

1. A 2575 kg demolition ball swings from the end of a crane, The length of the swinging segment of cable is 15 m.

Assuming the system can be treated as a simple pendulum what is the period of the swing? ___s

2.A wave has a speed of 264 m/s and a wavelength of 3.5 m.

a)What is the frequency of the wave? __Hz

b)What is the period of the wave?___s

3. A pendulum has a period of 0.70 s on Earth. What is its period on a planet where the acceleration of gravity is about 0.27 that on Earth? (answer is not 1.3s)

Explanation / Answer

To obtain the period (T) of swing, substitute 15 m for the length of the swing segment (L) and 9.81 m/s2 for the acceleration due to gravity (g) in the equation T = 2 L/g,
T = 2 L/g
= 2(3.14) (15 m)/(9.81 m/s2)
= 7.77 s

2. 1. freuency=264m/s/3.5m =75.43Hz

T=1/f=.01325s

3.

It's inversely proportional to the sq root of the g force, so the answer is

0.7 *root(1/.27)=1.34s

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