La Segunda Ley de Movimiento de Newton establece que a. los cuerpos en movimiento no pueden demostrar aceleración.
b. para cada fuerza de acción existe una reacción.
c. las fuerzas que actúan en objetos no causan aceleración.
d. la fuerza neta es igual al producto de la masa y la aceleración.

In which of the following cases is work being done on an object? question 2 options: pushing against a locked door carrying a box down a corridor pulling a trailer up a hill suspending a heavy weight with a strong

2kg of refrigerant 134a undergoes a polytropic process in a piston-cylinder assembly from an initial state of saturated vapor at 2 bar to a final state of 12 bar, 80 degree c. a)determine the work for the process in kj. b)sketch the process on a p-v diagram.

Awoman holds a book by placing it between her hands such that she presses at right angles to the front and back covers. the book has a mass of m = 1.8 kg and the coefficient of static friction between her hand and the book is μs = 0.67. no attempt 50% part (a) what is the weight of the book, fgb in newtons?