Two golf balls are hit from a flat field, each at an angle 30o above the horizontal. initial speed of ball 2 is twice the initial speed of ball 1. if ball 1 and ball 2 land a distance d1 and d2 respectively. what is the ratio of d2/d1

This energy transformation diagram represents the energy of a skateboarder moving along a half-pipe. as she skates toward the top of the half-pipe, her original kinetic energy is converted to potential energy and friction. how much of the energy is potential?

How many atoms of nitrogen are in the chemical formula ni(w on

3. a lunar exploration vehicle was created by a research team. it weighs 3,000 kg on the earth. it needs an acceleration of 10 m/s2 on the moon. in order to have the same acceleration, what will be the net force acting on the vehicle on the earth?