3. A bowling ball that weighs 70 N is dropped from a tower 15 meters above the ground. Disregarding air friction, what is the kinetic energy of the ball when it reaches the ground?
КЕ=

In raising a 6200-n piano with a pulley system, the movers note that, for every 2.2 m of rope pulled down, the piano rises 0.12 m . ideally, find the force required to lift the piano.

Air enters a compressor operating at steady state at 1.05 bar, 300 k, with a volumetric flow rate of 93 m3/min and exits at 12 bar, 400 k. heat transfer occurs at a rate of 15.5 kw from the compressor to its surroundings. assuming the ideal gas model for air neglecting kinetic potential energy effects, determine the power in put in kw.

We put a force of 50n on an object and the acceleration is 100 m/s². what is the mass of the object?