Achild rides the train at disneyland which takes him in a loop around the amusement park at a speed of 3 m/s. which statement best describes the child's motion on the train.
the velocity is changing because the direction is the same.

the velocity is the same because the speed is a constant.

the velocity is changing because the direction is changing.

the velocity is changing because the speed is the same.

A child rides the train at Disneyland which takes him in a loop around the amusement park at a speed of 3 m/s.

-- The speed is constant, because it's always 3 m/s.

-- The velocity is changing because the direction is changing. (This is one process that's called "acceleration".  Th e others are speeding up and slowing down.)

-- Strange as it may seem, the AVERAGE velocity for one whole loop around the whole park is zero !  Because velocity uses the distance between the start-point and the end-point, no matter what the route is from start to finish, and the ride ends in the same place where it began, so the distance between the start-point and end-point is zero.

a longitudinal wave moves energy that is to the direction of the wave’s movement. - true

the higher the current the higher the mag field around it the higher the influence on the compass