Consider the monica-platform system to be isolated (hence the frictionless axle) so that the angular momentum is conserved. as monica walks toward the center the moment of inertia of the system i so the angular velocity ω because angular momentum l = i ω

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.

What would be the radius of the earth if it had its actual mass but had the density of nuclei? express your answer to two significant figures and include the appropriate units.

What is the specific heat of wood ?