- The spring balance measures the total downward force exerted on it. - When the bird is sitting, this force is the sum of the weight of the cage and the weight of the bird. - When the bird is flying within a closed cage, the bird's weight is effectively transferred to the cage through aerodynamic forces (pushing air downwards).
A bird is sitting in a wire cage hanging from the spring balance. Let the reading of the spring balance be W₁. If the bird flies about inside the cage, the reading of the spring balance becomes W₂. Which of the following is true?
Asked in WBPSC CS Prelims 2023 · Topic: Mechanics (Newton's Laws of Motion and their applications)
More Physics questions
- It is difficult to walk On ice than on road because
- The speed of a car is increased from 30 kms/hr to 50 kms/hr in 2 minutes. What is the acceleration of the car ?
- A man is standing on a sensitive balance. If he inhales deeply, the reading of the balance
- The Earth travels on its orbit at a speed of approx 4,400 Kms per hour. Why do we not feel this high speed ?
- Consider the following statement and conclusions which can be drawn from it. Choose the correct conclusion. Statement : In starting a loaded cart, on has to push harder than to keep it moving. Conclusion:
- A person stands at a middle point of a wooden ladder which starts slipping between a vertical wall and a floor of a room, while continuing to remain in a vertical plane. The path traced by the person standing at the middle point of the slipping ladder is
- Consider the following statements: A 4- wheel vehicle moving a sharp circular path at high speed will Overturn about its outer wheels Overturn about its inner wheels Skid outwards Skid inwards Which of these statements are correct?
- A car is running on a road at a uniform speed of 60 km/hr. The net resultant force on the car is: