physics problem involving conservation of energy?

Question

the problem says... compare the input work to the output work. Based on your comparison, decide whether the principle of conservation of energy is violated. Explain your answer.

note:work input=4,500 J
work output=5,400 J

i think yes this principle is violated because more work was put out than into. plz help me with this?

Answer 1

The principle of conservation of enegry is violated.

For this equation to hold you would need an engine or a machine to input the extra energy necessary

Answer 2

Ya your mind-blowing! you do might desire to contain conservation of capability.. initially we've elastic skill capability so Usi = a million/2 kx^2 this capability equals to 0 because of the fact the rock is not on the spring. the astounding capability is kinetic so ok very final.... Kf = a million/2 mv^2 in accordance to the theory of mechanical capability K2 + U2 = K1 + U1 a million/2 mv^2 = a million/2 Kx^2 a million/2 (0.4) V^2 = a million/2 (one thousand)(0.3)^2 fixing for v we get ... 15 m/s to verify notwithstanding if the rock might attain a fifteen m top with that velocity.. we would desire to renowned the finished capability Us = a million/2kx^2 = a million/2 (one thousand) (.3)^2 = 40 5 j soo because of the fact the capability is conserved.. this capability is an analogous on the tip. because of the fact the rock stops on the optimal element,, we've skill capability then soo Ug = mgh 40 5 = (0.4)(9.8)h h =40 5 / 3.ninety two h = eleven.40 seven and to that end they are going to circulate hungry... because of the fact the rock wpnt surpasse the top of 15 m

Answer 3

yes, and your reasoning is correct.