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:
The result is a vector perpendicular to the xy plane: 23.38 k
Explanation:
The cross product of two vectors r and s is defined only in three-dimensional space and is denoted by r × s. The cross product is defined by the formula:
r × s =║r║·║s║· Sin θ· n
where θ is the angle between r and s in the plane containing them, ‖r‖ and ‖s‖ are the magnitudes of vectors r and s, and n is a unit vector perpendicular to the plane containing a and b in the direction given by the right-hand rule.
So, the result is:
r × s = 4.40 * 7.45 * Sin (134.5°) k = 23.38 k
Answer:
i know the first one.
Explanation:
the distance from earth in light years is 6 trillion miles.
Answer:
Option C: The solution begins to turn blue
Explanation:
When a copper wire is placed in a beaker containing a solution of silver nitrate(AgNO3), the copper (Cu) will reduce the positive silver ions (Ag+) to metallic silver (Ag). In this same process, Copper (Cu) is oxidized to produce Copper II ions (Cu2+).
The reaction will continue to progress and silver (Ag) crystals will begin to form on the Copper (Cu) wire and thus, we will observe that the solution becomes blue as a result of the formation of copper II (Cu2+) ions.
This is a single replacement reaction.