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Quiz

Lesson 1: Momentum, Newtons Three Laws of Motion, Impulse and Energy — Lesson quiz

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  • Questions count: 1
  • Passing grade: 60%
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1.
A body of mass 70 kg is placed on a spring scale fixed to the floor of an elevator. What is the scale reading in kg·wt if the elevator accelerates downwards at 1.4 m/s2?
80 kg·wt
70 kg·wt
60 kg·wt
50 kg·wt