THE PRACTICE STUDIO

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PRACTICE · MEMBERSIntermediate · Single correct

PRACTICE / Normal reaction

A scale during downward acceleration

A 60 kg passenger stands on a scale in a lift accelerating downward at 2 m/s².

Find the scale reading in newtons.

Organize the givens & assumptions
  • m = 60 kg
  • downward a = 2 m/s²

g = 10 m/s²; passenger remains in contact with the scale; downward acceleration is 2 m/s².

  1. A600 N600\ \mathrm N
  2. B720 N720\ \mathrm N
  3. C120 N120\ \mathrm N
  4. D480 N480\ \mathrm N

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