Home
Class 7
MATHS
Physical Science Application: Unequal ma...

Physical Science Application: Unequal masses will not balance on a fulcrum if they are at equal distance from it, one side will go up and the other side will go down.
Unequal masses will balance when the following proportion is true:
`" ""mass1"/"length2"="mass2"/"length1"`

Two children can be balanced on a seesaw when
`"mass"/"length2"="mass2"/"length1"`. The child on the left and child on the right are balanced. What is the mass of the child on the right?

Promotional Banner

Topper's Solved these Questions

  • COMPARING QUANTITIES

    NCERT EXEMPLAR|Exercise THINK AND DISCUSS|24 Videos

  • COMPARING QUANTITIES

    NCERT EXEMPLAR|Exercise THINK AND DISCUSS|24 Videos

  • ALGEBRAIC EXPRESSIONS

    NCERT EXEMPLAR|Exercise Check understanding |1 Videos

  • DATA HANDLING

    NCERT EXEMPLAR|Exercise THINK AND DISCUSS |3 Videos
NCERT EXEMPLAR-COMPARING QUANTITIES-EXERCISE
  1. Health Application A doctor reports blood pressure in millimetres of...

    Text Solution

    |

  2. The king cobra can reach a length of 558 cm. This is only about 60 per...

    Text Solution

    |

  3. Physical Science Application: Unequal masses will not balance on a ful...

    Text Solution

    |

  4. Language Application Given below are few Mathematical terms. Fi...

    Text Solution

    |

  5. Language Application Given below are few Mathematical terms. Fi...

    Text Solution

    |

  6. What’s the Error? An analysis showed that 0.06 per cent of the T-shirt...

    Text Solution

    |

  7. What’s the Error? A student said that the ratios 3/4 and 9/16 were pro...

    Text Solution

    |

  8. What’s the Error? A clothing store charges Rs. 1024 for 4 T-shirts. A ...

    Text Solution

    |

  9. A tea merchant blends two varieties of tea in the ratio of 5 : 4. The ...

    Text Solution

    |

  10. A piece of cloth 5 m long shrinks 10 per cent on washing. How long wil...

    Text Solution

    |

  11. Nancy obtained 426 marks out of 600 and the marks obtained by Rohit ar...

    Text Solution

    |

  12. A memorial trust donates Rs. 5,00,000 to a school, the interest on whi...

    Text Solution

    |

  13. Ambika got 99 per cent marks in Mathematics, 76 per cent marks in Hind...

    Text Solution

    |

  14. What sum of money lent out at 16 per cent per annum simple interest wo...

    Text Solution

    |

  15. Harish bought a gaschullah for Rs. 900 and later sold it to Archana at...

    Text Solution

    |

  16. Match each of the entries in Column I with the appropriate entries in ...

    Text Solution

    |

  17. In a debate competition, the judges decide that 20 per cent of the tot...

    Text Solution

    |

  18. Divide Rs. 10000 in two parts so that the simple interest on the first...

    Text Solution

    |

  19. Rs. 9000 becomes Rs. 18000 at simple interest in 8 years. Find the rat...

    Text Solution

    |

  20. In how many years will the simple interest on a certain sum be 4.05 ti...

    Text Solution

    |