A pulley is set up on the edge of a desk. A light string connects a 10 kg block laying on the desk to a 4 kg block hanging off the pulley. The only significant friction is with the desk, and the coefficient of kinetic friction is 0.20. Use the law of conservation of energy to find the speed of...
If the velocity is 0, then the KE is 0. So the initial KE when the block is on its way down the slope is 0 because at the top of the slope the block has stopped to change direction. Is the final KE also 0 because it is temporarily stopped there?
A 0.50 kg block is pushed against a 400 N/m spring, compressing it 22 cm. When the block is released, it moves along a frictionless horizontal surface and then up an incline (which has friction). The angle of the incline is 37 degrees and the coefficient of kinetic friction is 0.25. Use the...
Three sleds are being pulled horizontally on a frictionless horizontal ice using horizontal ropes. The pull is a magnitude of 125 N. Find (a) the acceleration of the system and (b) the tension in ropes A and B (see diagram below)
[30 kg sled]---rope B---[20 kg sled]---rope A---[10 kg...