Question

1. The sledder shown in (Figure 1) starts from the top of a frictionless hill and slides down into the valley. Suppose that h1 = 4.3 m and h2 = 5.5 m. What initial speed vi does the sledder need to just make it over the next hill?

2. A 42 g ball of clay traveling at speed 6.1 m/s hits and sticks to a 1.0 kg block sitting at rest on a frictionless surface. What is the speed of the block after the collision? b) The mechanical energy is not conserved in this collision. What percentage of the ball's initial energy is "lost"?

Answer 1

Both the problem involved the conservation of energy and momentum respectively , in an inelastic Collison , the loss of energy happens in terms heat