Calculate the weight of an object sitting on the Earth’s surface if the mass of the object is 50 kg? Assuming the force of gravity g = 9.81 m/s²).

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?

What kind of simple machine is a catapult?

When measuring volume, why is it important to use the correct tools and units to attain the greatest accuracy? use specific examples from the lab to support your answer. (5 points)