Question

WarmUp 5-Due 26 August Reading Objectives for Section 2.7 • Note the definition of free fall. What forces are acting on an object in free fall. • Pay special attention to the definition in equation 2.74. This is a magnitude. The sign on this value depends on whether you call up or down positive • Notice that equations 2.75 -2.77 are not new equations. They are 3 of our 5 kinematic equations that we know by heart now, with x's replaced by y's and "a" replaced with ". A rock is dropped into a well and it takes 7.0 seconds before you hear the splash below. 1. How deep is the well? 2. What is the impact velocity with which the rock hits the water?

Answer 1

- Monday Son Leth be depth of the cont time taken by rock to reach water ist che 28812 1 28409.02 2 h=201049 m or 28610.51m Th=201:49m - coell-is 201049m dcep. 1 time kurs taken by sound is t2 = 6 itott2 = 73. 2) Va vzgh-V 279.87201.49 N = 62.843 m/s. 117649 24 ore Jasura sa to +49 =0 to T z 62-4802h- 24010h+49 26 576480/= 0 h? 28812h+5764801= 0 7 ha 28812 + V (2881272.4% 576480)