An object moving in a linear path with acceleration in the opposite direction to its motion will indeed experience decreasing velocity. This phenomenon is commonly observed in situations where an object is subjected to a force that opposes its motion, such as friction or air resistance. As the object continues to move, the opposing force causes its velocity to gradually decrease until it eventually comes to a stop.

To understand this concept more clearly, consider the following scenario:

- Imagine a car moving along a straight road at a certain speed.

- If the driver suddenly applies the brakes, the car will experience a force in the opposite direction to its motion (i.e., backward).

- This opposing force, which is friction between the tires and the road, will cause the car's velocity to decrease.

- As the car continues to move forward, the friction force will continue to act against it, causing its velocity to decrease further until it eventually comes to a stop.

In this example, the acceleration of the car is in the opposite direction to its motion (backward), and as a result, the car's velocity decreases.

Mathematically, this relationship can be expressed using the equation of motion:

v = u + at

Where:

- v is the final velocity of the object

- u is the initial velocity of the object

- a is the acceleration of the object

- t is the time elapsed

In the case of an object moving with acceleration opposite to its motion, the acceleration (a) will be negative, which will result in a decrease in the final velocity (v).