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# Unit 5 Review

### Unit 5 Force and Motion

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

What is the formula for speed? | distance/time |

Two teams are playing tug of war. Team A is pulling to the right with 52 N. Team B is pulling to the left with 49 N. Which team will win? What is the net force? | 3N to the right |

A car travels 275 miles in 5 hours. What is the speed? | 55 mph |

What is an object’s speed with direction? | velocity |

A bicycle travels northwest 50 miles in 2 hours. What is the bicycle’s velocity? | 25 mph NW |

Give three ways an object’s acceleration can change. | speed up, slow down, change directions |

What are unequal forces in opposite directions? | unbalanced forces |

What are equal forces in opposite directions? | balanced forces |

A toy slides across the carpet and gradually stops. What forces are acting on the toy? | friction and gravity |

What energy transformation occurs in photosynthesis? | radiant to chemical |

What energy transformation occurs in a flashlight? | chemical to electrical to light |

What occurs when two surfaces rub together? | friction |

How do you calculate net force if the forces are opposite? | subtract |

How do you calculate net force if the forces are going the same direction? | add |