Class 4 Exam > Class 4 Questions > To do work, we needa)force. b)energy.c)...
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To do work, we need
- a)force.
- b)energy.
- c)hands.
- d)muscles.
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
To do work, we needa)force. b)energy.c)hands. d)muscl...
Explanation:
To do work, we need energy. Energy is the capacity to do work. It is the force required to move an object or cause a change in its position or state. Work is done when a force is applied to move an object over a distance. Without energy, no work can be done.
Work and Energy:
Work and energy are closely related concepts. Work is the transfer of energy from one object to another or from one form to another. Energy is required to do work, and work is the result of energy being transferred or transformed. In other words, work is a form of energy transfer.
Force:
Although force is required to do work, it is not the only requirement. Force is a push or pull that can cause an object to accelerate or decelerate, change its direction, or deform. While force is necessary for work, it is not sufficient on its own. Force alone cannot do work if there is no energy available.
Hands and Muscles:
While hands and muscles are used to apply force to perform work, they are not the fundamental requirement. Work can be done using various tools and machines that do not involve the use of hands or muscles directly. For example, a crane can lift heavy objects without using human hands or muscles. Therefore, hands and muscles are not essential for work.
Conclusion:
In conclusion, the correct answer is option 'B' - Energy. Energy is the fundamental requirement for work. It is the capacity to do work and is necessary for the transfer or transformation of energy from one object to another. While force, hands, and muscles may be involved in performing work, they are not the primary requirement.
To do work, we need energy. Energy is the capacity to do work. It is the force required to move an object or cause a change in its position or state. Work is done when a force is applied to move an object over a distance. Without energy, no work can be done.
Work and Energy:
Work and energy are closely related concepts. Work is the transfer of energy from one object to another or from one form to another. Energy is required to do work, and work is the result of energy being transferred or transformed. In other words, work is a form of energy transfer.
Force:
Although force is required to do work, it is not the only requirement. Force is a push or pull that can cause an object to accelerate or decelerate, change its direction, or deform. While force is necessary for work, it is not sufficient on its own. Force alone cannot do work if there is no energy available.
Hands and Muscles:
While hands and muscles are used to apply force to perform work, they are not the fundamental requirement. Work can be done using various tools and machines that do not involve the use of hands or muscles directly. For example, a crane can lift heavy objects without using human hands or muscles. Therefore, hands and muscles are not essential for work.
Conclusion:
In conclusion, the correct answer is option 'B' - Energy. Energy is the fundamental requirement for work. It is the capacity to do work and is necessary for the transfer or transformation of energy from one object to another. While force, hands, and muscles may be involved in performing work, they are not the primary requirement.
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Community Answer
To do work, we needa)force. b)energy.c)hands. d)muscl...
Explanation:
Introduction:
To do work, we need energy. Energy is the ability to perform work or cause changes in matter. It is a fundamental concept in physics and is required for any kind of work to be done.
Work and Energy:
Work is defined as the transfer of energy from one object or system to another. In order to do work, energy is needed. Work is done when a force is applied to an object and the object is displaced in the direction of the force. The amount of work done is equal to the product of the force applied and the distance over which the force is applied.
Force and Energy:
Force is a push or pull that can cause an object to move, stop, or change direction. It is required to do work, but it is not sufficient on its own. Force is a vector quantity, which means it has both magnitude and direction. It is measured in units called newtons.
Energy, on the other hand, is the ability to do work or cause changes in matter. It can exist in various forms such as kinetic energy, potential energy, thermal energy, chemical energy, etc. Energy is a scalar quantity, which means it only has magnitude and no direction. It is measured in units called joules.
Hands and Muscles:
While hands and muscles are required to apply force, they are not the primary factors needed to do work. They are the tools or means by which force is applied, but energy is the essential requirement.
Conclusion:
In conclusion, the correct answer is option 'B' - energy. Energy is the fundamental requirement to do work, while force, hands, and muscles are the means by which work is done. Without energy, no work can be performed, regardless of the presence of force, hands, or muscles.
Introduction:
To do work, we need energy. Energy is the ability to perform work or cause changes in matter. It is a fundamental concept in physics and is required for any kind of work to be done.
Work and Energy:
Work is defined as the transfer of energy from one object or system to another. In order to do work, energy is needed. Work is done when a force is applied to an object and the object is displaced in the direction of the force. The amount of work done is equal to the product of the force applied and the distance over which the force is applied.
Force and Energy:
Force is a push or pull that can cause an object to move, stop, or change direction. It is required to do work, but it is not sufficient on its own. Force is a vector quantity, which means it has both magnitude and direction. It is measured in units called newtons.
Energy, on the other hand, is the ability to do work or cause changes in matter. It can exist in various forms such as kinetic energy, potential energy, thermal energy, chemical energy, etc. Energy is a scalar quantity, which means it only has magnitude and no direction. It is measured in units called joules.
Hands and Muscles:
While hands and muscles are required to apply force, they are not the primary factors needed to do work. They are the tools or means by which force is applied, but energy is the essential requirement.
Conclusion:
In conclusion, the correct answer is option 'B' - energy. Energy is the fundamental requirement to do work, while force, hands, and muscles are the means by which work is done. Without energy, no work can be performed, regardless of the presence of force, hands, or muscles.
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