Multiple choice general knowledge science & technology

A mass of 100 kg is moved vertically upwards through a distance of 10 m. If the gravitational acceleration is 9.8 m s-2, then the work done against gravity is

  1. 980 J

  2. 98.0 J

  3. 9800 J

  4. 1000 J
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Work done against gravity is calculated as W = mgh, where m is mass (100 kg), g is gravitational acceleration (9.8 m/s²), and h is height (10 m). Therefore, W = 100 × 9.8 × 10 = 9800 J.

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