Energy stores, transfers and conservation

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Question 30
Easy

A student sets up a model electric lift to measure its energy transfers as it lifts a small mass.

Energy transfers for the model lift are shown in the Sankey diagram below.

A Sankey diagram showing the energy transfers for a model electric lift. A wide horizontal green arrow on the left represents the total input electrical energy of 1250 J. This arrow splits into two pathways: a straight horizontal pathway pointing to the right representing the useful output (increase in gravitational potential energy) of 820 J, and a curved downward pathway representing the wasted energy (transferred as thermal energy and sound to the surroundings) labelled as X.

Calculate the value of X.

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Energy stores, transfers and conservation Questions

  1. GCSE
  2. /Physics
  3. /Energy stores, transfers and conservation