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# Bella S2

### Forces

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

What is a force | a push, pull or twist on an object |

What are the units of Force | Newtons (N) |

What is the symbol for force | F |

What can a force do to any object? | Change its speed shape or direction |

What are the units for speed? | M/S or MS-1 |

What is the formula for distance? | D=VT |

What are the units of distance? | M |

What word do we use to describe the forces acting on an object at rest? | Balanced |

What are the units of acceleration? | M/S2 or MS-2 |

What is the word we use to describe the forces acting on an object that is slowing down? | Unbalanced |

What is the relationship between pressure and surface area? | The smaller the surface area the greater the pressure OR the greater the surface area the smaller the pressure |

What is the formula for Pressure? | P=F/area |

What are the units of pressure? | N/cm2 |

What can you do to the texture of an object to reduce friction? | make it smoother |

What is the force of gravity on Earth? | 10N/kg |

What name do we give for the force that is generated when 2 objects rub together? | Friction |

What word is used to describe an object whose speed keeps on increasing? | Accelerating |

Does a tack produce higher or lower pressure at its pointy end? | Higher |

What is the name for the type of friction generated between an object and the air | Air resistance |

Does a tack produce higher or lower pressure at its flat end | Lower |

How can you increase air resistance | Increase the surface area of the object (OR make object rougher) |

Why does a tack produce lower pressure at its flat end? | It has a higher surface area |

If the forces acting on an object are unbalanced, what happens to the object? | It either accelerates or decelerates |

What is the formula for weight | W=mg |

What is the relationship between and area and pressure | The greater the area the lower the pressure Or]The lower the area the greater the pressure |

Created by:
nscobie