# Bottle Rocket Engine Lab Report

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In physics, net force is the overall force acting on an object. This equation is written as follows: Fnet = Fthrust-Fg. The Fthrustis the force which makes an object move. In the case of the bottle rocket, the fuel being ejected from the rocket’s nozzle is thrusting the rocket into flight. In order to calculate Fnet, Fthrust & Fgmust be found first. The equation for Fthrustis as follows: ()(velocity)+(pressure)(nozzle area). The nozzle of the rocket is where the fuel was poured through and where the rocket was applied to the launcher. The equation for finding the area of a circle or circular area is r2. The amount of pressure for the rocket remained constant throughout all of the test launches, which was an amount of 80LB in2. As required, the amount of pressure was converted from LBin2to Nm2. The way to find velocity was previously stated. The equation for finding or mass flow rate is as follows: mass of waterflow time, the mass of water was calculated from the 10 fluid ounces that were used in the most successful launch. The flow time was constant for all rockets tested at 0.5 seconds. The fluid ounces had to be converted to metric units as well, then were converted into units of mass. The Fgis found by taking the mass of the rocket multiplied by acceleration, in equation form it appears

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The velocity of the rocket represents the distance the rocket gained over the amount of time it was in the air. The momentum represents how the mass of the rocket flew through the air per second. The height of the rocket represents how high the rocket flew with the data calculations from the most successful flight. The net force of the rocket represents both the thrust force and the force of gravity acting on the rocket as it flies. With all of the equations put together the rocket is completely represented in the way it