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Sally finds herself stranded on a frozen pond so slippery that she can't stand up or walk on it. To save herself, she throws one of her heavy boots horizontally, directly away from the closest shore. Sally's mass is 62.0 kg, the boot's mass is 5.00 kg, and Sally throws the boot with speed equal to 23.5 m/s. For all parts, assume the ice is frictionless and that the positive direction is towards the shore. What is Sally's speed us immediately after throwing the boot? m/s What is the displacement Ar of the center of mass of the Sally-boot system, relative to where she threw the boot, after m 10.0 s? How much time t does it take Sally to reach the shore, a distance of 30.0 m away from where she threw the boot? Us AFor = 1=
A 3.0-kg block (A) is attached to a 1.0-kg block (B) by a massless spring that is compressed and locked in place, as shown in the figure. The blocks slide without friction along the x-direction at an initial constant speed of v= 2.0 m/s. At time to 0s, the positions of blocks A and B are XAj = 1.0 m and xgj = 1.2 m, respectively, at which point a mechanism releases the spring, and the blocks begin to oscillate as they slide. If 2.0 s later block B is located at xBr = 7.3 m, what will be the position xr of block A? XAS == 000B Leve ме A I'N XBJ -X m