Question

Between seconds 0 and 3 the acceleration is 9.8 m/s^2.

Between seconds 3 and 4 acceleration is -29.4 m/s^2.

Between seconds 4 and 5 the acceleration does not change (it remains constant).

What is the significance of this difference (what does it tell us)?

Answer 1

In first interval i.e., from t=0 to t= 3 seconds,acceleration is 9.8 m/s^2

In second interval t= 3 to t= 4 seconds, acceleration is (-)29.4 m/s^2

Hence, magnitude of acceleration reduces from first instant to second instant.

From t=4 to t= 5 seconds,acceleration does not change i.e., acceleration is constant.

The significance of difference in acceleration from the above three instants indicates that acceleration is reducing

with respect to time i.e., object decelerates with respect to time.