Hardness Energy
Hardness Energy
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A mass of 4.0 kg of metal fell to a distance of 0.8 m over a horizontal surface to to prove hardness. 1) When the dough is dropped by 0.8 m, the energy is converted to gravitational potential? 2) How much energy kinetics have mass just before it reaches the horizontal surface? 3) What is the velocity of the body just before reaching the horizontal surface? 4) Assuming that 90% energy is converted into heat energy, the heat is produced when the body reaches the horizontal surface?
.. read formulas. 1/2mv = E ^ 2 + mgh
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