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amishra

  • 2 years ago

If a mass of 2.0 kg is lifted through a height of 5.0 m, what force does it require to lift it at constant speed?

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  1. Algebraic!
    • 2 years ago
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    mg

  2. apple_pi
    • 2 years ago
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    Doesn't matter how high its lifted. The gravitational force experience = mass * acc. due to gravity. To balance this, an equal force in the opposite direction is required. So first calculate the gravitational force

  3. apple_pi
    • 2 years ago
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    @amishra

  4. amishra
    • 2 years ago
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    Gravitational force is 9.81 m/s^2 ? If so, Then we just use f=ma like F= 2*9.81 ? Is this correct?

  5. apple_pi
    • 2 years ago
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    Wait... your question is what force is needed to keep it stationary or at constant speed. If stationary...do what I told you If constant speed, you need a net force of 0

  6. apple_pi
    • 2 years ago
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    but yeah that's correct

  7. amishra
    • 2 years ago
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    Wait, what force is needed to lift the object, assuming that we are moving at constant speed. So the force should come out to be negative right?

  8. apple_pi
    • 2 years ago
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    Lift the object at constant speed..? Force is a vector unit so depending on which direction you put it could be pos or neg

  9. amishra
    • 2 years ago
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    That's the question :/ Okay, thank you so much! :D

  10. apple_pi
    • 2 years ago
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    sure. anytime

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