23 Oct 2020 9:14 am

I | II | III |

MASS | m/s^{2} | Zero at the Centre |

WEIGHT | kg | Measure of inertia |

ACCELARATION DUE TO GRAVITY | Nm^{2}/kg^{2} | same in the entire universe |

GRAVITATIONAL CONSTANT | N | Depends on the height |

I | II | III |

MASS | kg | Measure of inertia |

WEIGHT | N | Zero at the Centre |

ACCELARATION DUE TO GRAVITY | m/s^{2} | Depends on the height |

GRAVITATIONAL CONSTANT | Nm^{2}/kg^{2} | same in the entire universe |

MASS | WEIGHT |

Mass is the amount of matter contained in a body. | Weight is the force exerted on a body due to the gravitational pull of another body such as Earth, the sun and the moon. |

Mass is an intrinsic property of a body. | Weight is an extrinsic property of a body. |

Mass is the measure of inertia. | Weight is the measure of force. |

The mass of a body remains the same everywhere in the universe. | The weight of a body depends on the local acceleration due to gravity where it is placed. |

The mass of a body cannot be zero. | The weight of a body can be zero. |

The mass of an object on the Earth will be same as that on Mars but its weight on both the planets will be different. This is because the weight (W) of an object at a place depends on the acceleration due to gravity of that place i.e.

S = hu = uv = 0a = -g

Let t be the time taken by the ball to reach height h. Thus, using second equation of motion, we have

Hence, from (i) and (ii), we observe that the time taken by the stone to go up is the same as the time taken by it to come down.