Atrain travels from the bottom of a hill to the top of a hill, its moves slower by the time it reaches the top is an example of a. positive acceleration b. velocity c. negative acceleration d. speed

The answer is letter C. A train travels from the bottom of a hill to the top of a hill, its moves slower by the time it reaches the top is an example of negative acceleration.

In physics, acceleration can be described as an objects change of velocity. When an object gains velocity, it is positive acceleration, and negative acceleration for the opposite.

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Negative Acceleration is when the acceleration of an object slows down, like throwing something in the air. It will get slower going up, and then it will stop, that is the negative acceleration, and then the object will come back down, and will speed up, which is positive acceleration.

A train travels from the bottom of a hill to the top of a hill, its moves slower by the time it reaches the top is an example of negative acceleration.
Best Choice :  C. negative acceleration

The magnets are probably damaged or there not strong enough to attached to the refrigerator