A block is projected with speed v across a horizontal surface and slides to a stop due to friction. The same block is then projected with the same speed v up an incline where is slides to a stop due to friction. In which case did the total mechanical energy of the block decrease the least?
选项:
A:This problem cannot be solved since it was not indicated whether the horizontal surface and the incline both had the same coefficient of kinetic friction.;
B:The case on the horizontal surface had the least decrease in total mechanical energy.;
C:The case on the inclined surface had the least decrease in total mechanical energy.;
D:In both cases the decrease in mechanical energy was the same.;
E:None of the others.
发布时间:2024-05-06 16:01:46