bunch of kids shoot a toy rocket upwards into the sky. It then returns to earth, emptied of fuel, and plunge?

Question

Question: A bunch of kids shoot a toy rocket upwards into the sky. It then returns to earth, emptied of fuel, and plunges into nearby pond . It briefly goes under, and then floats to the surface.

1) Use the above scenario as the means to describe fully and precisely what each one is(kind of forces). Explain the various circumstances under which each force changes or remains the same. compare and constrast all of these different forces, analyzing how they are alike and how they differ.

2) Demonstrate your understanding of Newton's three laws of motion and Newton's Universal Law of gravitational by describing how EACH law can be applied to some portion of the above scenario. Please help me because I don't know where to start with these questions. Thanks!

1 day ago - 2 days left to answer. - 2 answers - Report Abuse
You can't answer your own question.

Answer 1

The first type of energy is kinetic - initially in the expansion of the propellant. The propellant is directed downwards as a result of the design of the rocket and, due to Newton's 3rd law about actions and opposite reactions, the rocket accelerates upwards (Newtons 1st law - a body at rest stays at rest until acted on by a force).

Once the propellant is expended (or the force created by it is less than the force of gravity), the rockets slows to a stop and then gravity takes over - accelerating the rocket back towards earth (1st law again). The rate of acceleration of the descent is 9.8m/s-2 as this is the acceleration due to the force of gravity. The change in the velocity as it descends, is proportional to the force acting on it (i.e. gravity). The actual force is, of course, proportional to the product of the masses of the earth and the rocket, and inversely proportional to the distance between the earth and the rocket at any one time (Newton's universal gravitational law).

When it hits the water, the upthrust force created by the displacement of the water (Archimedes principal) is proportional to the mass of water displaced. This force slows the rocket to a stop, and then accelerates it back to the surface (Newton's 2nd law in action again).

This is the brief answer. YOU will need to do some of the thinking to flesh it out.

Answer 2

first one, as the rocket sits on the pad, it is known as potential energy - energy that is waiting to be transfered into another kind.

as the rocket is launched due to every action having an equal and/or opposite reaction, this is transfered into kinetic energy with the fuel going one way and the rocket going the other.

finally as the fuel (in this case water) has been expelled (emptied) from the rocket, gravity takes over and the rocket stops and falls back to earth (assuming it has not left the earths atmosphere, just kidding)

also, energy can not be created or destroyed, it can only be transfered into different forms

Answer 3

This sounds like you're trying to get people to do your homework for you.

Answer 4

no thanx- but thanx 4 2 pointz!!

Answer 5

Sorry mate. Do your own homework.

Answer 6

THEN THIS IS ILLEGAL FOR ENDANGERING LIFE AND WILDLIFE JUST REPORT THE KIDS AND HAVE DONE

Answer 7

You ain't my boss go figure it yourself.

Answer 8

sod off .im not at school still!