Um automovel, move-se a uma velocidade de 90km/h. As suas rodas têm um diâmetro de 50cm e não escorregam no solo . a) Qual é a velocidade linear de um ponto no Centro da roda?
b) Calcule a frequência de rotação da roda.
C) Calcule a velocidade linear e angular de um ponto da periferia.

During spring semester at mit, residents of the parallel buildings of the east campus dorms battle one another with large catapults that are made with surgical hose mounted on a window frame. a balloon filled with dyed water is placed in a pouch attached to the hose, which is then stretched through the width of the room. assume that the stretching of the hose obeys hooke's law with a spring constant of 89.0 n/m. if the hose is stretched by 5.80 m and then released, how much work does the force from the hose do on the balloon in the pouch by the time the hose reaches its relaxed length? unitst 3 number-1497 the tolerance is +/-5% open show work click if you would like to show work for this question:

What tightening torque should be used for a hexagonal head screw (not split-bolt) on a 250 kcmil conductor?

How do we measure or think of speed in the united states?