Q. Which of the following is/are a vector quantity?
  1. Temperature
  2. Work
  3. Kinetic Energy
  4. Momentum
  5. Power
Select the correct option from codes given below:

Answer: 4 Only
Notes:
  1. Temperature: Temperature is a scalar quantity. It only has magnitude (i.e., how hot or cold something is) but does not have a direction associated with it. So, temperature is not a vector quantity.
  2. Work: Work is a scalar quantity as well. While it involves the displacement of an object and the force applied, the direction of work is determined by the direction of the force and displacement, but work itself is just a scalar value. So, work is not a vector quantity.
  3. Kinetic Energy: Kinetic energy is a scalar quantity. It depends on the mass and the square of the velocity of an object, but it does not have a direction. Therefore, kinetic energy is not a vector quantity.
  4. Momentum: Momentum is a vector quantity. It is defined as the product of an object's mass and its velocity. Importantly, momentum has both magnitude and direction, making it a vector quantity. The direction of momentum is the same as the direction of the velocity of the object.
  5. Power: Power is a scalar quantity. It represents the rate at which work is done or energy is transferred. While power is related to work, it does not have direction associated with it, making it a scalar quantity.
So, the vector quantity among the options is: