If a spring has a constant of #2 (kg)/s^2#, how much work will it take to extend the spring by #87 cm #? Physics Work and Energy Work 1 Answer Junaid Mirza Mar 14, 2018 #"0.76 Joule"# Explanation: Energy stored in a spring is given by #U = 1/2\ "kx"^2# Energy stored in spring when it’s streched by #"87 cm"# is #U = 1/2\ "kx"^2 = 1/cancel(2)\ cancel(2)\ "kg/s"^2 × ("0.87 m")^2 = "0.76 Joule"# Work = #U_f - U_i = "0.76 J - 0 J = 0.76 J"# Answer link Related questions What is a force? What are some examples of work? What are some examples of displacement? How are force, energy, and work are related? How can I calculate the displacement of an object? How are work and kinetic energy related? How do you calculate the displacement of water? How do you calculate the force of gravity between two objects? Why is work negative? 55,000J of work is done to move a rock 25m. How much force was applied? See all questions in Work Impact of this question 270 views around the world You can reuse this answer Creative Commons License