Measuring Forces with Spring Balances
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Questions and Answers

What is a force?

  • A type of matter
  • A type of energy
  • A push or a pull (correct)
  • A type of motion

    • What is the effect of a force on a stationary object?

  • It changes its direction
  • It remains unchanged
  • It changes its shape
  • It makes it move (correct)

    • What is the unit of measurement for forces?

  • Meters
  • Kilograms
  • Newton (correct)
  • Joules

    • What happens to a spring when it is pushed or pulled?

    <p>It is compressed or stretched</p> Signup and view all the answers

    What is the approximate force exerted by an apple on your palm?

    <p>1 N</p> Signup and view all the answers

    What is the purpose of a forcemeter or spring balance?

    <p>To measure the force of an object</p> Signup and view all the answers

    What is the primary function of the pointer attached to the spring in a spring balance?

    <p>To measure the magnitude of the force</p> Signup and view all the answers

    What happens to the spring when a force is applied to it in a downward direction?

    <p>It becomes stretched</p> Signup and view all the answers

    Which of the following is NOT a type of spring balance used in a laboratory?

    <p>Digital spring balance</p> Signup and view all the answers

    What is the primary difference between the spring balance used in a laboratory and the one used in markets or grocery stores?

    <p>The scale used to measure the force</p> Signup and view all the answers

    What is the relationship between the force applied to the spring and the resulting extension or compression?

    <p>The force is directly proportional to the extension or compression</p> Signup and view all the answers

    What happens to the stone when the string tied to it is cut in water?

    <p>It sinks in the water</p> Signup and view all the answers

    What is the relationship between the weight of the wood in air and the upthrust acting on the wood in water?

    <p>The upthrust can be greater than, smaller than, or equal to the weight of the wood in air</p> Signup and view all the answers

    What is the purpose of step 4 in the Try It Out activity?

    <p>To gently place the wood in the water and record the weight of the wood</p> Signup and view all the answers

    What happens to the wood when the string is cut in water, according to the experiment?

    <p>It floats on the surface of the water</p> Signup and view all the answers

    What is the force that acts on the wood when it is immersed in water?

    <p>Both the weight of the wood and the upthrust</p> Signup and view all the answers

    What is the condition for an object to float in water?

    <p>The weight of the object is smaller than the upthrust</p> Signup and view all the answers

    What is the force exerted by a fluid on an object that is partially or fully immersed in it?

    <p>Upthrust</p> Signup and view all the answers

    Why does an object weigh less in water than in air?

    <p>Because the upthrust cancels out some of the weight of the object</p> Signup and view all the answers

    What is the relationship between the weight of the displaced water and the upthrust?

    <p>The weight of the displaced water is equal to the upthrust</p> Signup and view all the answers

    What happens to the arms of a balance when one of the weights is immersed in water?

    <p>The arms become unbalanced</p> Signup and view all the answers

    What is the primary difference between the concepts of mass and weight?

    <p>Mass is the force exerted by an object on the surface, while weight is the force exerted by gravity on an object</p> Signup and view all the answers

    What is the name of the ancient scientist who discovered the principle related to the upthrust?

    <p>Archimedes</p> Signup and view all the answers

    Which of the following statements about gravitational force is true?

    <p>Gravitational force can act from a distance, similar to magnetic force</p> Signup and view all the answers

    What is the direction of the upthrust and weight acting on an object partially or fully immersed in a fluid?

    <p>The upthrust and weight act in opposite directions</p> Signup and view all the answers

    What would be the weight of an object with a mass of 1 kg on the Moon?

    <p>Less than on Earth, but not zero</p> Signup and view all the answers

    According to the scientific definition, what is your weight if your mass is 50 kg?

    <p>500 N, the force exerted by gravity on your body</p> Signup and view all the answers

    What is the primary reason objects fall towards the ground when released from a height?

    <p>The Earth's gravity pulls them towards its centre</p> Signup and view all the answers

    In which environment would astronauts float in the absence of gravity?

    <p>In outer space</p> Signup and view all the answers

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