I've got a question on thermal energy:
Two railroad cars, each of mass 6500 kg and traveling 86 km/h, collide head-on and come to rest. How much thermal energy is produced in this collision?
Converted 86 km/h to m/s = 2.389 m/s
I assumed that KE converted all into thermal energy:
KE =...
Hi, this my first time asking a question, so here it goes:
A 255 kg piano slides 4.6 m down a 30° incline and is kept from accelerating by a man who is pushing back on it parallel to the incline (Fig. 6-35). The effective coefficient of kinetic friction is 0.40.
(a) Calculate the force...