A wooden block moves along a horizontal frictionless surface, as shown in Fig. 2.1. [Figure 2.1] The block has mass 85g and moves to the left with a velocity of 2.0ms⁻¹. A steel ball of mass 4.0g is fired to the right. The steel ball, moving horizontally with a speed of 45ms⁻¹, collides with the block and remains embedded in it. After the collision the block and steel ball both have speed v.