Physics Ch.10 Simple Harmonic Motion – with accurate answers (verified)Graded A

SITUATION: Spring horizontal on table Energy conservation - Answers-NO HEIGHT, NO ROTATION h = 0 object is not rotating, wf and wo = 0 initial speed vo=0 SITUATION: Ball fall on spring - Answers-½kxo² = ½kxf² or ½ky² = mgh SITUATION: If Young's modulus is greater - Answers-it means the material is tougher, compresses less than other material SITUATION: Stress and surface area - Answers-Smaller surface area experiences more stress Speed and Amplitude - Answers-more speed = more amplitude Ideal spring x - Answers-distance from equilibrium point Simple Harmonic Motion - Answers-when an object oscillates back and forth Friction free graph looks like sinusoidal sine or cosine function T = period, time it takes to return to starting point Total energy in simple harmonic motion is conserved - Answers-TE = KE + PE = ½mv²+½kx² The Pendulum - Answers-w = 2πf = √mgL/I w = √g/L Elastic Deformation - Answers-To compress an object along 1 direction F = Y(∆L/L₀)A Bend with Shear Force - Answers-F = SA(∆X/Lo) Change in Pressure - Answers-force per unit area Object compresses or expands, P - Po = -B∆V/Vo Pressure = change in volume/original volume -B cuz pressure decreases volume Stress = - Answers-F/A [N/m²] Strain = - Answers-(∆L/L₀) [fraction = no units] T= - Answers-seconds/oscillation [s] velocity or height - Answers-conservation of energy Spring constant K - Answers-stiffness of spring large K = large force required to stretch or compress it Restoring force - Answers-RESTORES IT TO EQULIBRIUM F = -kx OPPOSITE DISPLACEMENT TO RESTORE IT * CAN CONTRIBUTE TO NET EXTERNAL FORCE (-) means restoring force is always pointing in the opposite direction of the displacement of the spring from its unstrained form In restoring let go, spring ex