Answer to Question #121933 in Mechanics | Relativity for jonell

Question

You drop a rock with a mass of 1.14 kg from the top of a bridge with a height of 199m, When the rock is a height of 65.6m above the ground, its kinetic energy will be a.bc * 10^d J. the values of a, b ,c and d are .........

Answer 1

Applying energy conservation

$K_i+U_i=K_f+U_f$

$0+1.14\times9.8\times199=K_f+1.14\times9.8\times65.6$

$K_f=$ 1490.345 joules