Asled is being pulled across a horizontal patch of snow. friction is negligible. the pulling force points in the same direction as the sled's displacement, which is along the +x axis. as a result, the kinetic energy of the sled increases by 47.9 percent. by what percentage would the sled's kinetic energy have increased if this force had pointed 68.6 ° above the +x axis?

Compare the horizontal displacement of the two balls as they travel to the ground. what do you observe?

In a heat engine if 1000 j of heat enters the system and the piston does 500j of work, what is the final internal energy of the system if the inital energy was 2000 j1.write the equation2.list out your known variables 3. plug the numbers into the equations4.solve 5.write your solution statement that includes initial energy and final energy added.

Aparticle of mass m is placed in a one-dimensional box of length l. the box is so small that the particle’s motion is relativistic, so that e p2/2m is not valid. (a) derive an expression for the energy levels of the particle using the relativistic energy–momentum relation and the quantization of momentum that derives from connement. (b) if the particle is an electron in a box of length l 1.00 1012 m, nd its lowest possible kinetic energy. by what percent is the nonrelativistic formula for the energy in error?