5. anak tangga Setiap anak tangga Tangga menuju lantai dua terdiri atas sepuluh ketinggian 20 cm. Seorang anak ketinggian anaik sampai ke lantai memiliki energi yang dikeluarkan anak itu adalah __ a. 100.000 joule b. 90.000 joule C. 10.000 joule d. 100 joule

Please use the formula Work = Force * Distance to calculate it.

This question is about the concept of work done in physics. It involves the calculation of work done (or energy expended) by a person walking up a flight of stairs. In Physics, the formula to calculate work done is Work = Force x Distance. Here, the person's weight becomes the force (because he fights against gravity while going up) and the total distance covered equates to height of 10 steps. Each step is 20 cm high. Therefore, the total height of the staircase = 10 steps × 20 cm/step = 200 cm = 2 m. The force (weight of the person) = mass of the person × gravitational acceleration = 50 kg × 9.8 m/s­² = 490 N. The Work Done (also the energy expended) = Force × Distance = 490 N × 2 m.