Revision: Work, Energy & Power Report a question What's wrong with this question? You cannot submit an empty report. Please add some details. 08 Work, Energy & Power - Revision Quiz Test your understanding of Work, Energy & Power here: 1 / 5 1) A girl of weight 500 N runs up a flight of stairs in 10 seconds. The vertical height of the stairs is 5 metres. What is the average power developed by the girl? 100 W 50 W 250 W 1000 W 2 / 5 2) 2023 S3 EOY P1 Q26 A girl of weight 600 N runs up a flight of stairs in 12 s. The vertical height of the flight of stairs is 3.0 m. What is the average power developed by the girl? 150 W 21 600 W 1 800 W 0.0067 W 3 / 5 3) A crane lifts a load of 1000 N through a vertical height of 3.0 m in 10 s. The input power to the crane is 500 W. What is the efficiency of the crane? 17 % 60 % 67 % 50 % 4 / 5 4) A constant force of 9.0 kN, parallel to an inclined plane, moves a body of weight 20 kN through a distance of 40 m along the plane at constant speed. The body gains 12 m in height, as shown. How much of the work done is dissipated as heat? 240 kJ 600 kJ 120 kJ 360 kJ 5 / 5 5) 2017 S4 EOY P1 Q09 A machine lifted a 500 N weight to a height of 3.0 m in 2.0 s. What is the amount of energy required to lift the same weight to a height of 3.0 m in 1.0 s? 500 J 1500 J 750 J 3000 J Your score is Restart quiz
