# Physics 200 (Test 3)

rename
valleystudent84's
version from
2016-10-07 04:55

## Section

Question | Answer |
---|---|

Eq - linear momentum (p) | p = m*v |

Eq - CHANGE in linear momentum (Δp) | Δp = mv(f) - mv(i) |

when p increases by 4, KE increases by _ | 16 (square of momentum) |

impulse - Define | The product of the force acting on a body times the time interval |

Eq Impulse (I) STANDARD = | ΣF(avg) * Δt = I = Δp |

Calc Eq Impulse (I) = | ∫ (ΣF)dT = I = Δp |

Equal net work inputs implies = ? | Kinetic Energy (KE) |

When a person in accident, increasing the _ lessens the damage | Δt |

While in motion, does a baseball carry force? | No - force requires tht two objets act on one another |

Can a baseball have MORE KE than a bat at rest? | No - conservation of energy |

Can a ball deliver MORE p to a bat and batter | Yes - by bouncing off the bat/batter it can |

why doesnt recoil throw guns? | The KE of the bullet is FAR greater than the gun. Would require more velocity to move gun |

Bomb explodes. Is p conserved? what is total of p? | Yes. the fragments p is all equal to the inital bomb - 0 |

Bomb explodes> Is KE conserved? | No. The PE of the chemicals is CHANGED into KE of explosion |

Impulse-Momentum Theorem | Δp = F*Δt → F = (Δp)/(Δt) = (m)[(v(f) - v(i))/(Δt)] |

p is conserved IFF _ | There is NO net external force acting on an object |

Inelastic collisions - Eq | Σk(i) = Σk(f) |

Elastic Collisions - Eq | Σk(i) ≠ Σk(f) |

Perfect Inelastic - define - KE is _ | Collide and stick together - KE is conserved |

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