A tree is subject to three forces as follows: 25 N pushing west, 10 N pushing
south (due to the slope it is growing on) and a third force of unknown magnitude and
direction (due to being tied to a stake to prevent it falling). What must the magnitude
and direction of the third force be in order that the tree experiences no net
acceleration?
A gas is compressed from 5 L to 3 L under an average pressure of 200000 Pa. During the compression 0.3 kJ of heat is given off. The internal energy of the gas
In a certain gas system, the pressure remains constant at 150 kPa even though 1000 J of heat is added. The volume change is 1.8 L. How much does the internal energy in joules of the system change.
A 100 kg mass drop 3 m, resulting in an increased volume in the cylinder of 0.002m^3. the weight and the piston maintain constant gage pressure of 100KPa. Determine the net work done by the gas on surroundings. Neglect all friction