A 50 kg ice skater moving at 5 m/s collides with a second stationary skater with mass 70 kg. The skaters cling together after the collision and move without friction. Compute their speed after the collision.(3 sig figs)

Consider the following problem: a box with an open top is to be constructed from a square piece of cardboard, 3 ft wide, by cutting out a square from each of the four corners and bending up the sides. find the largest volume that such a box can have.

How would doubling the made of an object change the objects potential energy

What are the factors that affect the resistance of a wire?