Un bloque de 2kg está sobre un plano inclinado 30° sobre la horizontal y que se encuentra en rotación a 30 rev/min. alrededor de un eje vertical que pasa por el extremo inferior del plano. ¿A qué distancia l (ele) desde el extremo inferior del plano la bola permanece en equilibrio y cuál es la fuerza centrípeta que actúa sobre el bloque?

Aperson gives a shopping cart an initial push along a horizontal floor to get it moving, and then lets go. the cart travels forward along the floor, gradually slowing as it moves. consider the horizontal force(s) on the cart while it is moving forward and slowing. which of the following statements is correct? (a) both a forward and a backward force are acting on the cart, but the forward force is larger. (b) only a forward force is acting which diminishes with time. (c) both a forward and a backward force are acting on the cart, but the backward force is larger. (d) only a backward force is acting, no forward force.

A200 g lead frying pan gains 2000 joules of heat. what is the change in temperature

Gravity is pulling an object into the sun. the closer the object gets to the sun, the greater the gravitational force that acts on the object, increasing its acceleration. a line graph plotting the speed of the object against time would have which shape? a: straight line of positive slope b: curved line that slopes upward c: curved line that slopes downward d: straight line of negative slope