**Objective:**

- Newton’s 2nd Law i.e.
*F=ma* - The law of conservation of energy
- Velocity and acceleration
- Power

**Newton’s 2nd Law i.e. F=ma:**

a) The acceleration does vary with mass.

b) The acceleration does vary with the power levels.

Mass (kg) | Acceleration (rpm/s) | Power Level (%) | Acceleration (rpm/s) | |

0.25 | 40.869839 | 100 | 89.66584 | |

0.2 | 42.477848 | 75 | 42.477848 | |

0.15 | 47.462272 | 50 | 16.984233 | |

0.1 | 65.160454 | 25 | 1.343651 |

**Explore the Law of Conservation of Energy:**

a) Computing *Potential Energy = mgh*

mgh (J) |

0.6125 |

0.49 |

0.3675 |

0.245 |

0.49 |

0.49 |

0.49 |

0.49 |

b)

Mass (kg) | Battery Discharge (MV) |

0.25 | 111 |

0.2 | 69 |

0.15 | 13 |

0.1 | 41 |

* *

** **

The battery discharge increases as the mass increases.

**Calculate the average power used by the motor:**

Power Level (%) | Power (watt) |

100 | 0.343618513 |

75 | 0.730253353 |

50 | 0.150030618 |

25 | 0.040013065 |

As the Power Level increases the Power should increase as well. The slope is 0.006 and the intercept is -0.0568.

Does the time is important in this experiment ?