Question

acceleration can be negative or positive depending upon the motion of a body. give examples from daily life to explain the statement.

Answer 1

If an object is slowing down, then its acceleration is in the opposite direction of its motion. ... Thus, this object has a positive acceleration. In Example B, the object is moving in the negative direction (i.e., has a negative velocity) and is slowing down.

Answer 2

friction is an example of negative acceleration.

whereas a car accelerating on a road is an example for positive acceleration.

a body thrown upwards experiences gravitational force which produces negative acceleration.