What is the mechanical energy can be accumulated?
By kendedes2011
@kendedes2011 (2712)
Indonesia
December 28, 2010 11:20pm CST
Suppose there is 1 kg of gravel will be crushed with an iron mass of 5 kg from a height of 1 m with the assumption that the acceleration of gravity is 10m/s2.
a, How much energy is received by gravel weighing 1 kg when crushed 1 time?
b, What is true of the energy received by gravel weighing 1 kg if the ground is 10 times 10 times the energy received from the 1 time pulverization?
c, How large is the total energy received by gravel weighing 1 kg if the ground 10 times?
2 responses
@nakula2009 (2325)
• Indonesia
10 Jan 11
Mechanical activation-induced chemistry allows a variety of physiological processes are remarkable, including the senses of touch, hearing and balance, as well as growth and repair of tissue and bone
@gengeni (3308)
• Indonesia
30 Dec 10
a. Et = Epmax = mgh = 5 * 10 * 1 = 50 J
Based energy balance sheet in respect of thermodynamics First law of energy conservation,
Gravel ?E = Q - Wbesi, Q = 0 and Wbesi = Ep max = Et
(?Ep + ?Ek + ?U) = W iron gravel, gravel = ?Ek ?Ep gravel = 0
Gravel ?U = - Wbesi, W iron = - 50J (gravel as a system subject to employment)
Pebble gravel ?U = ?E = 50 J
b. Right. Because energy is a quantity that can be added or be extensive in the concept of thermodynamics.
c. ?U = ?E gravel gravel total total = (-) 10 Wbesi = 500 J
