WHAT always results from friction. Heat, Mechanical energy, or motion

If vx = 7.00 units and vy = -7.60 units, determine the magnitude of v⃗ . determine the direction of v⃗ .

Determine el momento angular de un rueda de 3000g moviendose a 10m/s con un radio de giro de 400cm

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?