Grace drives her car 168 km in 2 hours. What is her average speed in kilometers per hour?

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?

If an electric circuit is not grounded it is best to reach out and touch it to provide the ground a.true or b.false

By what factor does the drag force on a car increase as it goes from 65 to 110 km/h?