Question

engage: check for understanding
example: skateboarders motion
lets assume moving to the right is positive, and moving to the left is negative. a skateboarder is moving to the right. as they approach the end of the sidewalk, they slow down and eventually stop. in this case, the skateboarders velocity is ______ (increasing, decreasing), but since they are still moving to the right (positive direction), their acceleration is ______ (positive, negative) because it opposes their motion.
after stopping, the skateboarder turns around and skates to the left, speeding up. now, their velocity is increasing in the ______ (positive, negative) direction. since both the velocity and acceleration are in the same direction, the acceleration is ______ (positive, negative).

Explanation:

La velocidad es la rapidez y dirección del movimiento. Aceleración es el cambio en la velocidad. Cuando el skateador se ralentiza mientras se mueve hacia la derecha (dirección positiva), su velocidad está disminuyendo y la aceleración es negativa porque se opone al movimiento. Cuando se gira y se mueve hacia la izquierda (dirección negativa) y acelera, tanto la velocidad como la aceleración son negativas ya que son en la misma dirección.

Answer:

decreasing, negative, negative, negative