Which is an example of negative exceleration?

A car breaking down.

Rolling a ball that slows to a stop.

A coin tossed upward(before it starts falling).

Explanation:

So any time you see something slowing down, that's an example of negative acceleration.

A. Negative acceleration in other words is just deceleration, So any time you see an objects velocity decreasing or well slowing down that is an example of negative acceleration.

A car breaking down and coming to a stop is a common example of negative acceleration