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Answer:
The velocity is 19.39 m/s
Solution:
As per the question:
Mass, m = 75 kg
Radius, R = 19.2 m
Now,
When the mass is at the top position in the loop, then the necessary centrifugal force is to keep the mass on the path is provided by the gravitational force acting downwards.
where
v = velocity
g = acceleration due to gravity
Answer:
the index of refraction of the other material = 1.31
Explanation:
Critical angle is given by the formula;
sin(θ_crit) = n_r/n_i
Where;
θ_crit is critical angle
n_r is index of refraction of the Refractive medium
n_i is index of refraction of incidence medium
We are given that θ_crit = 81° and n_i = 1.33
Thus;
sin 81 = n_r/1.33
n_r = 1.33 × sin 81
n_r = 1.33 × 0.9877
n_r ≈ 1.31
The suns gravity pulls on the planets and keeps them in place. Its gravitational pull puts them in orbit around the sun