{"id":243484,"date":"2024-01-29T16:00:15","date_gmt":"2024-01-29T08:00:15","guid":{"rendered":"https:\/\/thepiquelab.com\/blog\/?p=243484"},"modified":"2024-04-18T11:44:37","modified_gmt":"2024-04-18T03:44:37","slug":"forces-how-do-forces-affect-balancing-objects","status":"publish","type":"post","link":"https:\/\/thepiquelab.com\/blog\/forces-how-do-forces-affect-balancing-objects\/","title":{"rendered":"Forces: How Do Forces Affect Balancing Objects?"},"content":{"rendered":"

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Introduction<\/strong><\/p>\n

Today, we will be looking at two objects balancing on a rod. When we think of balance, an image of a traditional scale may come to your mind, with weight distributed equally on both sides.<\/p>\n

\"\"<\/p>\n

Since we are talking about equal weight, we commonly think that gravity is the only force at work here. However, when you add magnets under the weights, there will be more forces acting upon the weights than simply gravity!<\/p>\n

To understand this better, we will be analysing a question on Forces<\/strong><\/a> from the 2017 St. Nicholas Girls\u2019 School (SNGS) P6 SA2 Examination Paper<\/strong>.<\/p>\n\n

Let’s Take A Look At This Question<\/h2>\n

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Source: CHIJ <\/span>St. Nicholas Girls\u2019 School \u2013 2017 P6 SA2 Examination Paper [Q36]<\/span><\/em><\/p>\n

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Read Also:<\/h3>\n
    \n
  1. Ultimate Science Practice Series: Forces (Practice Questions & Explainer Videos)<\/a><\/strong><\/li>\n
  2. Graph Question: Magnetic Force – Distance<\/strong><\/a><\/li>\n
  3. 5 Easy Steps To Conquer Questions On Forces<\/strong><\/a><\/li>\n<\/ol>\n<\/div>\n

    Thought Process<\/h2>\n

    As shown in the diagram below, Object T and Magnet X are balanced on the rod. As you can see here, Object T is on the left side and Magnet X is on the right side.<\/p>\n

    \"\"<\/p>\n

    Source: CHIJ <\/span>St. Nicholas Girls\u2019 School \u2013 2017 P6 SA2 Examination Paper [Q36]<\/span><\/em><\/p>\n

    \n

    \ud83d\udccd What Does ‘Balanced’ Mean?<\/strong>\ud83d\udccd<\/strong><\/p>\n

    \u2018Balanced\u2019 means that the forces on the right<\/strong> side of the rod and the left<\/strong> side of the rod are equal<\/strong>.<\/p>\n<\/blockquote>\n

    And that\u2019s where you can see that the plastic rod is horizontal.<\/p>\n

    Now, between the force pulling Object T downwards and the overall force pulling Magnet X downwards, are they the same or different?<\/p>\n

    \"\"<\/p>\n

    Here, they are going to be the same<\/strong>.<\/p>\n

    Moving on to Magnet Y. Magnet Y is below Magnet X.<\/p>\n

    \"\"<\/p>\n

    If we look closely at Magnet X and Magnet Y, what can we tell about the interaction between these two magnets?<\/p>\n

    \n

    \ud83d\udccd What Is ‘Interaction?’<\/strong>\ud83d\udccd<\/strong><\/p>\n

    When we say \u201cinteraction<\/strong><\/em>\u201d, we are referring to magnetic force of attraction<\/strong> and magnetic force of repulsion<\/strong>.<\/p>\n<\/blockquote>\n

    Do you think the magnets are attracting or repelling?<\/p>\n

    If we take a closer look, we can see that the like poles of the magnets are facing each other. The north pole of Magnet X and the north pole of Magnet Y are facing each other.<\/p>\n

    When the like poles of magnets are facing each other, will they attract, or will they repel?<\/p>\n

    \"\"<\/p>\n

    Magnets X and Y will repel, so there will be an upward force on Magnet X, and there will be a downward force on Magnet Y. This is caused by the magnetic force of repulsion<\/span>.<\/p>\n

    Let’s Analyse Part (A)<\/h2>\n

    \u201cIs Object T less than, equal to or greater than 50g?\u201d<\/strong><\/p>\n

    To answer this question, we have to identify the forces involved. Besides the magnetic force of repulsion between Magnets X and Y, is there any other force that we need to consider? Does Object T have any force acting down on it?<\/p>\n

    If we were to list out the 4 types of forces that you have learnt so far, we have:<\/p>\n