SEGUNDA LEY DE NEWTON
SEGUNDA LEY DE NEWTON
APLICADA AL MOVIMIENTO CIRCULAR
A roller-coaster car has a mass of 500 kg when fully loaded with passengers. (a) If the car has a speed of 20 m/s at point A, what is the force exerted by the track on the car at this point? (b) what is the maximum speed the car can have at B and still remain on the track?.
A child´s toy consists of a small wedge that has an acute angle tetta . The sloping side of the wedge is frictionless, and a mass m on it remains at constant height if the sedge is spun at a certain constant speed. The wedge is spun at a certain constant speed. The wedge is spun by rotating a vertical rod that is firmly attached to the wedge at the bottonm end. Show that, when the mass sits a distance L up along the sloping side, the speed of the mass must be v= (gLsin)1/2
