The disk has a moment of inertia of 1/2 M R^2
and dw/dt = T /I but T = F* R so dw/dt = F*R/I = F*R/( 1/2 M R^2) = 2 F/(MR) Now v = wR so dv/dt = 2 F / M
For the individual to rush at g/4 then the force performing on the wheel must be 3mg/4 ( where m = 90 kg) so g/4 = 2 * 3mg / 4M 1 = 2*3 m / M M = 6 * 90 = 540kg
And tension must be 3/4 of the weight of the person = 3mg/4 = 405 N
Answer:
okay
Explanation:
but what is the question here?
Answer:
Time according to earth clock (T0) = 0.22 years (Approx)
Explanation:
Given:
Time taken by light = 4.5 years
Time taken by ship = 5 years
Speed of light = c
Speed of ship (v) = 90% of c = 0.9c
Find:
Time according to earth clock (T0) = ?
Computation:
Time dilation is ,
Time according to earth clock (T0) = 0.22 years (Approx)
Answer:
686 days for sideral period of Mars.
615 days for synodic period of Venus.
Explanation:
The equations we need to use is:
Where P is the sidereal period, S the synodic period and E the Earth's period (365 days) and where the + is used for inferior planes (Venus) and the - for superior ones (Mars).
For the sidereal period of Mars we then have:
And for the synodic period of Venus we then have:
(Commonly for Venus a sidereal period of 225 days is given, which changes this result to 587 days).
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Thus Collette's idea is a hypothesis.
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