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Dana.A.Al Shammari: Name Qualification: Master physics Solids state: Department بسم الله الرحمن الرحيم

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Find the spring constant of a spiral spring Achieving Hooke’s law

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A spring constant is the measure of the stiffness of a spring

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If a mass m is attached to the lower end of the spring,the spring stretches a distance of d from its is initial position under the influence of the weight W=mg w:weight(N) m:mass(kg) g: Accelration of (gravity(m/s 2 W=mg w:weight(N) m:mass(kg) g: Accelration of (gravity(m/s 2

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2-The upward restoring force F(r)

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In the case of the blance

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m...........X 0=…………cm, X 0 d=∆X=X-X 0 Elongation(m) Distance X(m) Distance X(cm) F(w)=mg (N) Mass (kgm) Mass (gm) ∑ ∆X/n=…… ∑ F/n=……

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∆X(m) F(w) (N) Slope (F(w2), ∆X2) (F(w1), ∆X1) 1- Slope=k= k exp k= K thor

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k exp & k thot

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Dana.A.Al Shammari: Name Qualification: Master physics Solids state: Department بسم الله الرحمن الرحيم

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To find the resultant force by analytically and experimentally (force table)

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A vector is a quantity that possesses both magnitude and direction; examples 1- Velocity (V) 2- Acceleration (a) 3- Force (F)

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In case one vector Each force is resolved into X,Y components:

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In case one vector Find the resultant

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In case mor vectors Find the resultant F X = ∑ F x =F 1 X+F 2 X F Y =∑F Y =F 1 Y+F 2 Y F1 F2 F2 Cosθ

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αβɣF3(N) M1g F2(N) M1g F1(N) M1g M3 (Kg) M2 (Kg) M1 (Kg) No 800.10.071 1000.090.122 1200.08 3 F1,F2=ɣ F2,F3=β F3,F1=α

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F1x= F1 Cosθ1 = 0.686 Cos 0 = 0.686N F1y=F1 Sinθ1 = 0.686 Sin 0 = 0 F2x=F2 Cosθ2 = 0.98 Cos 80= 0.17N F2Y= F2 Sin 80 = 0.98 Sin 80= 0.965N Fx Fy ∑Fx=F1x + F2x = 0.686 + 0.17 = 0.856 N ∑Fy=F1y + F2y = 0 + 0.965 = 0.965 N Magnitude=F3 = R == =1.28 N

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F1 F2 ɣ =80 θ=48.4 β=148.4 α =131.6 Y X F1,F2=ɣ F2,F3=β F3,F1=α -F3 F3

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THEROTICAILEXPERMENTLY F3=1.28 NF3=1.32N ɣ =80 β = 148.4β = 150 α = 131.6 α = 130

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Learn what “work” is! Learn how to calculate work See who can do the most work! Learn about power. Learn Hooke’s Law.

Learn what “work” is! Learn how to calculate work See who can do the most work! Learn about power. Learn Hooke’s Law.

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