Students were asked to answer a question at school and to express what is most important for them to succeed. Of many replies, the one that that stood out was practice. Successful people are certainly not born successful; they become successful by just hard work and determination. This is how you can fulfill your goals. as follows are one of the answer and question example that you possibly will make use of to practice and elevate your practical knowledge and also give you insights that would help you to sustain your study in school.

## Question:

You launch a model rocket from ground level. it moves directly upward with a constant acceleration of 80.5 m/s2 for 1.40 seconds, at which point it runs out of fuel. assuming air resistance on the rocket is negligible, what is the maximum altitude (above the ground) achieved by the rocket

## Answer:

If the rocket starts at rest, then

Then in the 1.40 seconds during its initial ascent, the displacement over this period is given by

Once fuel runs out, the only force acting on the rocket is that due to gravity, so the rocket’s acceleration drops to a constant . The rocket’s displacement is then captured by

You can find the maximum displacement from here by completing the square:

This tells you that a maximum displacement/altitude of about is achieved by the rocket at .

From the answer and question examples above, hopefully, they might possibly guide the student resolve the question they had been looking for and take note of all the details declared in the answer above. Then will be able to carry out some sharing in a group discussion and also study with the classmate relevant to the topic, so another student also gain some enlightenment and still keeps up the school learning.