2. A man pulls on a rope that goes over a pulley above and lifts a bucket weighing 50N upward at constant speed. There is friction in the pulley. After lifting the bucket a distance of 27m, he has done 1650 j of work. What is the average force of friction acting

The consumption of fossil fuels could be

The experiment done in lab is repeated, using a ball that has unknown mass m. you plot your data in the form of f 2 versus m/l, with f in rev/s, m in kg, and l in m. your data falls close to a straight line that has slope 3.19 m/(kg · s2). use g = 9.80 m/s2 and calculate the mass m of the ball.

What can you increase the strength of an electromagnet by