4. Consideremos um plano inclinado, onde o corpo de massa m, = 5Kg está ligado a um corpo de massa m= 8Kg pendurado por um fio inextensível que passa através de uma roldana fixa de peso
desprezível. Sabendo que o coeficiente de atrito entre o plano e o corpo é 0,3 e o ângulo do plano é
30º. Considera g = 10m/s?, calcula:
a) A aceleração do sistema
b) A tensão no fio.
(R:38,24N)
Si
30°

High schoolphysics 5+3 pts a neon light consists of a glass tube with metal wires at each end. when connected to a high-voltage source, the gas glows. if a fly lands on the glass tube, what will most likely happen? a) the fly will not feel a shock because the glass conducts any free electrons back into the gas. b) electrons will flow directly from the metal wires along the glass and shock the fly. c) the fly will not feel a shock because the glass insulates it from the electrons in the gas and the metal. d) electrons that are moving through the gas will be conducted through the glass and shock the fly.

If the force applied to an object remains constant, is more power needed for the object to move faster ? explain

A4.0-cm tall light bulb is placed a distance of 32.0 cm from a concave mirror having a focal length of 16.0 cm. determine the image distance