Question 1: The 50-kg, uniform crate slides down the inclined surface with an initial speed of 10 m/s. If the coefficient of kinetic friction between the crate and the inclined surface is = 0.15, determine the distances the crate has moved when it momentarily stops. (Assume tipping over does not happen.) 30° (a) 4.88 m (b) 7.26 m (c) 9.81 m (d) 13.8 m

1 Problem During a particularly snowy winter in Charlotte, a child of mass m slides down a ramp starting at rest from point A and encounters the melted grassy area at B before coming to a full stop at C. Assume the ice is frictionless. The height of point A is hĄ and the distance between B and C is L. What is the coefficient of friction of the grass, k? Assume that g = 9.81 m/s², ha = 5 m, m = 20 kg, and L = 10 m. hA P JA Ice B Grass L C

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Cart 1 Mass - M Cart 2 Mass = 3.5M Force Sensor The spring cart (cart 1) is released and collided inelastically with cart 2 and the two carts move off together. The spring does not add any mass to cart 1. Assume negligible friction in the cart wheels.