Questão sobre conservação da energia mecânica Na figura a seguir um bloco de massa 1,0 kg comprime em 10 cm uma mola cuja constante elástica é k =2000 N/m. Soltando-se o sistema mola-bloco, o bloco percorre a trajetória até atingir a altura de 0,60 m em relação ao nível inicial. Adotando g=10 m/s2, determine a energia dissipada ao longo da trajetória.

Abug is 12 cm from the center of a turntable that is rotating with a frequency of 45 rev/min . what minimum coefficient friction is required so that the bug stays on the turntable?

The least penetrating form of radiation is

Four objects each with charge +2.0×10−7c are located at the corners of a square whose sides are 2.0 m long. part a what quantities can be determined using this information? check all that apply. the electric force on a charged object placed at the center of the square. the mass of each object. the total electric potential energy of the system consisting of the four charged objects. part b find the electric force on a charged object placed at the center of the square.