Determine and plot the moment M which must be applied to the crank OA in order to hold the cylinder of mass m = 5 kg in equilibrium. Neglect the effects of the mass of OA and friction and consider the range 0 ≤ θ ≤ 180°. After you have the plot evaluate M at θ = 64° and 113°. State the maximum and minimum values of the absolute value of M and the values of θ for which these extremes occur, and physically justify these results.

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me

at right angles to each other

did yall get answers for this yet