A 70.0 ball of clay is thrown horizontally with a speed of 12.0 toward a 920 block resting on a frictionless surface. It hits the block and sticks. The clay exerts a constant force on the block during the 12.0 it takes the clay to come to rest relative to the block. After 12.0 , the block and the clay are sliding along the surface as a single system. What is their speed after the collision? What is the force of the clay on the block during the collision? What is the force of the block on the clay?