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  3. 9th Class
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  5. Gravitation and Floatation

9th Class Science Gravitation and Floatation Question Bank Gravitation Formative Objective Problems

  • question_answer
    A man weights W on the surface of Earth. What is the weight at a height equal to R?

    A)  W                                          

    B)  W/2  

    C)  W/4  

    D)  W/8

    Correct Answer: C

    Solution :

       \[\frac{{{W}_{h}}}{W}=\frac{mg}{mg}=\frac{{{g}_{h}}}{g}=\frac{{{R}^{2}}}{{{(R+h)}^{2}}}\] or \[{{W}_{h}}=\frac{W}{4}\]                     


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