When you power walk, you get the same fitness workout as , but it's much easier on the body. Options:

A. Skipping

B. Galloping

C. Running

D. Sleeping

E. None of the above

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.