Un corp este tras orizontal si rectiliniu uniform pe o suprafata plana cu ajutorul unui dinamometru. Dinamometrul indiva 15 diviziuni . Daca se suspenda corpul de carligul ndinsmometrului tinut vertical, el va indica 35 diviziuni. sa se determine raportul dintre forta de frecare si greutatea corpului. Va rog ajutati-ma cu asta cat de repede puteti

Which configuration would produce an electric current? a) rotate a coil of copper wire between two magnets. b) connect a wire between a copper and zinc strip sitting in a beaker of water. c) connect a wire to the (+) positive end of a battery and the other end to a light bulb. d) connect a wire to the negative end of a battery and the other end to a light bulb.

An object's buoyant force and weight mean the same thing.a. trueb. false

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up