main

prev        

Statement of a problem № 42190

        next    

Some Typical Kinetic Energies (a) How many joules of kinetic energy does a 75-kg person have when walking and when running? (b) In the Bohr model of the atom, the ground-state electron in hydrogen has an orbital speed of 2190 km/s. What is its kinetic energy ? (Consult Appendix F) (c) If you drop a l.0-kg weight (about 2 lb) from shoulder height, how many joules of kinetic energy will it have when it reaches the ground? (d) Is it reasonable that a 30.kg child could run fast enough to have 100 J of kinetic energy?




New search. (Also 5349 free access solutions)