An airplane in level flight at an altitude h and a uniform speed v passes directly over a radar tracking station A. Calculate the angular velocityθ_ and angular acceleration €θ of the radar antenna as well as the rate r_ at which the airplane is moving away from the antenna. Use theequations of this chapter (rather than polar coordinates, which you

pe = weightxheight = 2000x1000=2,000,000joules

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

force required to detach it is given by

charges are taken to be fundamental charge

now we have

so above is the minimum distance at which it will detach