(b)Illustrateyouranswerin10(a)withobservablephenomena.

One observable phenomenon that can illustrate the concept of acceleration is a car speeding up from a stop sign. As the car's driver presses on the gas pedal, the car's velocity increases over time. This change in velocity indicates that the car is undergoing acceleration.

Another example of acceleration can be seen in a roller coaster as it travels down a steep hill. As the roller coaster descends, its velocity increases due to the force of gravity pulling it downwards. This change in velocity is a clear indication of acceleration in action.

Lastly, a basketball player jumping to make a slam dunk also demonstrates acceleration. As the player bends their knees, pushes off the ground, and propels themselves upwards, their velocity increases rapidly as they soar towards the basket. This rapid increase in velocity showcases the acceleration of the player's jump.