A wrecking ball has a mass of 650 kg. it swings from a cable that is 21 m long. the centripetal force on the ball is 56 n. what
2 answers:
1.35 m/s
Explanation:
The centripetal force on the ball is given by:
where
m=650 kg is the mass of the ball
v is the tangential speed
r=21 m is the length of the cable (which is the radius of the circular path of the ball)
F=56 N is the centripetal force
By re-arranging the equation, we can calculate the tangential speed of the ball:
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Answer:
Inductance as calculated is 13.12 mH
Solution:
As per the question:
Length of the coil, l = 12 cm = 0.12 m
Diameter, d = 1.7 cm = 0.017 m
No. of turns, N = 235
Now,
Area of cross-section of the wire, A =
We know that the inductance of the coil is given by the formula:
Explanation:
It is given that,
The period of the carrier wave, T = 0.01 s
Let f and are frequency and the wavelength of the wave respectively. The relationship between the time period and the frequency is given by :
f = 100 Hz
The wavelength of a wave is given by :
So, the frequency and wavelength of the carrier wave are 100 Hz and respectively. Hence, the correct option is (c).