Un objeto de masa m está en reposo en equilibrio en el origen. en t=0 se aplica una fuerza F(t) con componentes:

donde k1,k2 y k3 son constantes. Calcule losvectores de posición r(t) y velocidad v(t) en función del tiempo.

In science and physics what is the standard unit of measure for speed?

A100-watt light bulb illuminates a solar cell. the electricity from the solar cell operates a water pump that delivers 1 watt of power. what is the efficiency of the system?

Aspherical ball of charged particles has a uniform charge density. in terms of the ball's radius r, at what radial distances inside and outside the ball is the magnitude of the ball's electric field equal to 14% of the maximum magnitude of that field? a)inside the ball: b) outside the ball: