Two plasticine balls with diameters of 25 mm and 40 mm moved towards each other at speeds of 5 m / s and 2 m / s. At what speed and in what direction did the balls stuck together in an absolutely inelastic collision? How much heat was released?

You are your friend move a new refrigerator into his kitchen. you apply a horizontal force of 252 n in the negative x direction to try and move the 56 kg refrigerator. the coefficient of static friction is 0.61. (a) how much static frictional force does the floor exert on the refrigerator? give both magnitude (in n) and direction. magnitude n direction (b) what maximum force (in n) do you need to apply before the refrigerator starts to move?