COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 4, Problem 19QAP
To determine
The variation in scale readings when elevator begins to ascend, goes up at constant speed, stops, begins to descend, goes down at a constant speed, and stops again.
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Chapter 4 Solutions
COLLEGE PHYSICS
Ch. 4 - Prob. 1QAPCh. 4 - Prob. 2QAPCh. 4 - Prob. 3QAPCh. 4 - Prob. 4QAPCh. 4 - Prob. 5QAPCh. 4 - Prob. 6QAPCh. 4 - Prob. 7QAPCh. 4 - Prob. 8QAPCh. 4 - Prob. 9QAPCh. 4 - Prob. 10QAP
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- A person stands on a scale in an elevator. As the elevator starts, the scale has a constant reading of 592 N. As the elevator later stops, the scale reading is 400 N. Assume the magnitude of the acceleration is the same during starting and stopping.arrow_forwardWhen a 50-kg person steps on a scale in a moving elevator, the scale reads a steady 490 N. Which one of the 8 following statements can be true? XA: The elevator is moving downward at a increasing speed > B: The elevator is moving upward at a constant speed XC: The elevator is moving upward at a decreasing speed X D: The elevator is moving downward at a decreasing speed XE: The elevator is moving upward at a increasing speedarrow_forwardThe strings and frictionless pulleys have negligible masses. The coefficients of kinetic friction is 0.25 and static friction is 0.30. Block A has a mass of 3 kg and block B has a mass of 4 kg. a) What is the maximum mass block C can have before block B will start to move? b) If block C has a mass of 7 kg and was 1 m above the ground, how long would it take block C to hit the ground starting from rest?arrow_forward
- You've always wondered about the acceleration of the elevators in the 101 story high Empire State Building. One day, while visiting New York, you take your bathroom scale into the elevator and stand on it. The scale reads 189 lblb as the door closes. As the elevator moves upward the scale reading varies between a minimum value of 150 lblb and a maximum value of 239 lblb . What is the magnitude of the acceleration as the elevator starts upward? What is the magnitude of the acceleration as the elevator brakes to a stop?arrow_forwardA woman weighing 600 N stands on a scale in an elevator. She presses the button for the BOTTOM floor. Immediately as the elevator starts to accelerate downward, the scale will read: Less than 600 N O 600 N More than 600 N O It is impossible to knowarrow_forwardAn object of mass 4 kg originally suspended by a vertical cord is pulled by a horizontal force until the cord makes an angle of 60° with the vertical. What is the tension in the cord?arrow_forward
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