In the case of block and tacklle arrangement mechanical advantage increases with the number of pulleys. Why?

The free body diagram shows a box being pulled to the left up a 25-degree incline. the magnitude of the normal force is

Argon is adiabatically compressed from an initial volume of 16 liters to a final volume of 2 liters. by what factor do the following quantities change? do they increase or decrease? (a) the rms speed (b) the thermal energy of the gas (c) the molar specific heat cv (d) the pressure

Suppose you plot the distance traveled by an object at various times and you discover that the graph is not a straight line. what does this indicate about the object's acceleration?