sobre una superficie sin fricción de un objeto de 10kg en movimiento choca con un objeto de 5 kg en reposo. Si los objetos quedan pegados durante el choque con una rapidez de 4 m/s. ¿Cuál es el valor de la velocidad inicial del objeto en movimiento antes del choque?

The of a machine determines its "usefulness." a. input force b. output force c. mechanical advantage

Aperson stands on a platform, initially at rest, that can rotate freely without friction. the moment of inertia of the person plus the platform is ip. the person holds a spinning bicycle wheel with its axis horizontal. the wheel has moment of inertia iw and angular velocity ωw. take the ωw direction counterclockwise when viewed from above. part a what will be the angular velocity ωp of the platform if the person moves the axis of the wheel so that it points vertically upward?

Could someone . i have tried to solve myself but my calculation is off