A block of mass m = 5.9 kg slides from left to right across a frictionless surface with a speed It collides with a block of mass M that is at rest. After the collision, the 5.9-kg block reverses direction, and its new speed is The block of mass M travels to the right at a speed V of 3.8 m/s. What is M? 7.9 kg

Emmy kicks a soccer ball up at an angle of 45° over a level field. she watches the ball's trajectory and notices that it lands, two seconds after being kicked, about 20 m away to the north. assume that air resistance is negligible, and plot the horizontal and vertical components of the ball's velocity as a function of time. consider only the time that the ball is in the air, after being kicked but before landing. take "north" and "up" as the positive ‑ and ‑directions, respectively, and use ≈10 m/s2 for the downward acceleration due to gravity.