(a) What objects constitute the system, andthrough what forces do they interact?

Question

(a) What objects constitute the system, andthrough what forces do they interact?
1The Block, the potential engery

(b) What are the two points of interest?
2Kinetic and Potential Energy

(c) Find the energy stored in the spring when the mass is stretched5.60 cm from equilibrium and againwhen the mass passes through equilibrium after being released fromrest.
x = 5.60 3 J x = 0 4 J
(d) Write the conservation of energy equation for this situationand solve it for the speed of the mass as it passes equilibrium.(Do this on paper. Your instructor may ask you to turn in thiswork.)

(e) Substitute to obtain a numerical value.
5 m/s

(f) What is the speed at the halfway point?
6 m/s

(g) Why isn't it half the speed at equilibrium? (Do this on paper.Your instructor may ask you to turn in this work.) x = 5.60 3 J x = 0 4 J

Explanation / Answer

conservation of energy k*x2/2=m*v2/2 +k*x'2/2 x=0.056 m; x'=0 m; => v=1.33 m/s half-way point: x=0.056 m; x'=0.028 m => v=1.15 m/s

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