Acow has eaten 1500kj of stored chemical energy in the form of food. 945 kj is excreted as waste products. 495 kj is used for respiration. how much of the original 1500 kj is stored as chemical energy in the tissue of the cow ?

Aspring is used to stop a 50-kg package which is moving down a 20º incline. the spring has a constant k = 30 kn/m and is held by cables so that it is initially compressed 50 mm. knowing that the velocity of the package is 2 m/s when it is 8 m from the spring and neglecting friction, determine the maximum additional deformation of the spring in bringing the package to rest.