If an object with a mass of #5 kg # changes speed from #3m/s# to #16 m/s#, by how much does its kinetic energy change? Physics Work and Energy Energy 1 Answer ali ergin Oct 23, 2016 #Delta E=617.5" Joules"# Explanation: #m:"mass"# #v_i:"initial velocity"# #v_f:"final velocity"# #E_1=1/2m*v_i^2# #E_2=1/2*m*v_f^2# #Delta E=E_2-E_1# #Delta E=1/2*m-v_f^2-1/2*m*v_i^2# #Delta E=1/2*m(v_f^2-v_i^2)# #Delta E=1/2*5*(16^2-3^2)# #Delta E=5/2(256-9)# #Delta E=5/2*247# #Delta E=617.5 " Joules"# Answer link Related questions How do matter and energy interact? Question #50ca2 Question #242cf Question #5038d Question #50391 What is potential energy? Question #d6576 Question #50cae Question #50cb2 Question #50cb6 See all questions in Energy Impact of this question 1349 views around the world You can reuse this answer Creative Commons License