A train going 14m/s moves 250 m while accelerating to a stop. What is the train’s deceleration?

What is the momentum of a 2 kg object moving at 15 meters per second

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up

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?