QUESTIONS AND ANSWERS CONFIDENCE
BUILDER 2026
• Kinetic energy . Answer: 0.5 × mass × speed²
• Elastic potential energy (on sheet) . Answer: 0.5 × spring constant ×
extension²
• G.P.E. . Answer: mass × gravitational field strength × height
• Change in thermal energy equation (on sheet) . Answer: mass ×
specific heat capicity × change in temperature
• Power . Answer: work done/ time (P=w/t)
• Efficiency . Answer: useful output energy transfer/ total input energy
transfer
• Efficiency . Answer: total useful power output/ total power input
• Charge flow . Answer: current x time (Q=IT)