A 2 kg book is lifted 1 m by one route and 1 m by a longer zig-zag route. The work done against gravity is:

  1. the same both ways (19.6 J)
  2. zero for both
  3. smaller for the zig-zag route
  4. larger for the zig-zag route
Answer

A) the same both ways (19.6 J)

Gravity is conservative: mgh = 2 9.8 1. SLO P-11-B-31 · Understanding

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