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

Rohit is trying to tune an instrument

Your science teacher brings in a speaker to talk to your class about climate change. during the session, students ask a few questions. which questions are related to the current evidence on climate change

Anonzero net force acts on a particle and does work. which one of the following statements is true? the kinetic energy of the particle changes, but the speed of the particle does not change. the kinetic energy of the particle does not change, but the speed of the particle does change. the kinetic energy of the particle changes, but the velocity of the particle does not change. the kinetic energy and the speed of the particle change, but the velocity of the particle does not change. the kinetic energy, speed, and velocity of the particle change.