box of mass 400 kg is supported on a spring scale on the floor of a goods lift. The mass of the lift is 1900 kg. The lift is travelling from the 20th floor to the ground floor. At an instant when the deceleration of the lift is 1.2 ms-2 as it approaches the ground floor, what is the reading recorded by the scale? 1. 351 kg 2. 387 kg 3. 449 kg 4. 461 kg

box of mass 400 kg is supported on a spring scale on the floor of a goods lift. The mass of the lift is 1900 kg. The lift is travelling from the 20th floor to the ground floor. At an instant when the deceleration of the lift is 1.2 ms-2 as it approaches the ground floor, what is the reading recorded by the scale? 1. 351 kg 2. 387 kg 3. 449 kg 4. 461 kg

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter4: The Laws Of Motion

Section: Chapter Questions

Problem 2OQ

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