Part A A glider with mass 0.22 kg sits on a frictionless horizontal air track, c

Question

Part A A glider with mass 0.22 kg sits on a frictionless horizontal air track, connected to a spring of negligible mass with force constant 7.6 N/m You pull on the glider, stretching the spring 0.58 m What is its speed when it is 0.1 m away from the equilibrium? 3 significant figures from the equilibrium point, and then release it with no initial velocity. The glider begins to move back toward its equilibrium position (z = 0) m/s Submit My Answers Give Up Part B What is its position when the glider has a speed of 1.24 m/s? 3 sig fig Submit My Answers Give Up ide Feedbac

Explanation / Answer

A)

Use law of conservation of energy,

KEf = Emax-PEf

½*m*vf^2=1/2*k*A^2 – ½*k*xf^2

Plug values,

½*0.22*vf^2=1/2*7.8*0.58^2-1/2*7.8*0.1^2

vf= 3.40 m/s

B)

Use law of conservation of energy,

PEf = Emax-KEf

½*k*xf^2=1/2*k*A^2 – ½*m*vf^2

Plug values,

½*7.8*xf^2=1/2*7.8*0.58^2-1/2*0.22*1.24^2

xf= 0.54 m/s

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