Class 9 Exam > Class 9 Questions > Which of the following is not a vector quanti...
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Which of the following is not a vector quantity
A Energy
B Kinetic energy
C Work done
D Power
A Energy
B Kinetic energy
C Work done
D Power
- a)(a), (b) and (c) are correct
- b)(b) and (c) are correct
- c)(a) and (b) are correct
- d)All of these
Correct answer is option 'D'. Can you explain this answer?
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Most Upvoted Answer
Which of the following is not a vector quantityA EnergyB Kinetic energ...
Answer:
To determine which of the following is not a vector quantity, let's examine the properties of each option:
A. Energy:
- Energy is a scalar quantity, not a vector quantity.
- It is measured in joules (J) and represents the capacity to do work or produce heat.
- Energy does not have a direction associated with it.
B. Kinetic energy:
- Kinetic energy is a scalar quantity, not a vector quantity.
- It is defined as the energy of an object due to its motion.
- Kinetic energy depends on the mass and speed of an object, but not its direction.
C. Work done:
- Work done is a scalar quantity, not a vector quantity.
- It is defined as the product of the force applied to an object and the displacement of the object in the direction of the force.
- Work done depends on the magnitude of the force and the distance moved, but not the direction.
D. Power:
- Power is a scalar quantity, not a vector quantity.
- It is defined as the rate at which work is done or energy is transferred.
- Power is measured in watts (W) and depends on the amount of work done or energy transferred per unit time.
Therefore, the answer is A. Energy because it is not a vector quantity.
To determine which of the following is not a vector quantity, let's examine the properties of each option:
A. Energy:
- Energy is a scalar quantity, not a vector quantity.
- It is measured in joules (J) and represents the capacity to do work or produce heat.
- Energy does not have a direction associated with it.
B. Kinetic energy:
- Kinetic energy is a scalar quantity, not a vector quantity.
- It is defined as the energy of an object due to its motion.
- Kinetic energy depends on the mass and speed of an object, but not its direction.
C. Work done:
- Work done is a scalar quantity, not a vector quantity.
- It is defined as the product of the force applied to an object and the displacement of the object in the direction of the force.
- Work done depends on the magnitude of the force and the distance moved, but not the direction.
D. Power:
- Power is a scalar quantity, not a vector quantity.
- It is defined as the rate at which work is done or energy is transferred.
- Power is measured in watts (W) and depends on the amount of work done or energy transferred per unit time.
Therefore, the answer is A. Energy because it is not a vector quantity.
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Community Answer
Which of the following is not a vector quantityA EnergyB Kinetic energ...
Explanation:
A vector quantity is a physical quantity that has both magnitude and direction. In contrast, a scalar quantity is a physical quantity that has only magnitude.
Energy:
Energy is a scalar quantity because it only has magnitude. It does not have direction. Examples of energy include potential energy and kinetic energy.
Kinetic Energy:
Kinetic energy is also a scalar quantity. It is the energy of an object due to its motion. It depends on the mass and velocity of the object. Kinetic energy does not have direction.
Work Done:
Work done is a scalar quantity. It is the product of the force applied on an object and the displacement of the object in the direction of the force. Work done does not have direction.
Power:
Power is a scalar quantity. It is the rate at which work is done or energy is transferred. Power is equal to the work done or energy transferred divided by the time taken. Power does not have direction.
Conclusion:
From the above explanations, it can be concluded that all of the given options (a), (b), (c), and (d) are vector quantities. None of the options is a vector quantity. Therefore, the correct answer is option D - All of these.
A vector quantity is a physical quantity that has both magnitude and direction. In contrast, a scalar quantity is a physical quantity that has only magnitude.
Energy:
Energy is a scalar quantity because it only has magnitude. It does not have direction. Examples of energy include potential energy and kinetic energy.
Kinetic Energy:
Kinetic energy is also a scalar quantity. It is the energy of an object due to its motion. It depends on the mass and velocity of the object. Kinetic energy does not have direction.
Work Done:
Work done is a scalar quantity. It is the product of the force applied on an object and the displacement of the object in the direction of the force. Work done does not have direction.
Power:
Power is a scalar quantity. It is the rate at which work is done or energy is transferred. Power is equal to the work done or energy transferred divided by the time taken. Power does not have direction.
Conclusion:
From the above explanations, it can be concluded that all of the given options (a), (b), (c), and (d) are vector quantities. None of the options is a vector quantity. Therefore, the correct answer is option D - All of these.
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