Recent content by klwong

p=mv since speed is slower， during the backword process the final momenton of the black ball is smaller?

What if during the reset process when the balls are moved forwards, we give the balls a speed much slower than 0.1m/s ?

Assuming there are four robot inside a stationary spacecraft (mass 2 ton) , robot A has an electric gun that can shoot iron balls weighing 1kg at a speed of 8m/s. These balls collide with red balls at a 45-degree angle in a two-dimensional elastic collision. Each ball has a mass of 1kg. The red...