How much time would it take for an object to fall 4.7 meters? Given (g =a=-9.81 m/s^2)

Truck traveling west on the highway experiences an acceleration to the east. what could be the cause of this acceleration

Suppose an objects initial velocity is 10m/s and it’s final velocity is 4 m/s. mass is constant. what can best be concluded about the object based in the work-energy theorem

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?