The total mechanical energy of a moving body at some point in time is 34 J.
| April 30, 2021 | education
The total mechanical energy of a moving body at some point in time is 34 J. Determine the amount of heat released when the body is decelerated by the friction force, if its total mechanical energy has changed to a value of 8 J.
These tasks: Ecomplete1 (total mechanical energy at an arbitrary moment of time) = 34 J; Ecomplete2 (total mechanical energy after braking) = 8 J.
The heat released during the deceleration of a given body is calculated by the formula: Q = ΔEtot = Etot1 – Etot2.
Calculation: Q = 34 – 8 = 26 J.
Answer: When a given body was decelerated, 26 J of heat was released.
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