The 6-kg collar is released from rest at a and slides down the inclined fixed rod in the vertical plane. the coefficient of kinetic friction is 0.7. calculate: (a) the velocity v of the collar as it strikes the spring, (b) the maximum deflection x of the spring, and (c) if the coefficient of kinetic friction is changed to 2.8, what would be the maximum deflection x of the spring?

When a vertical beam of light passes through a transparent medium, the rate at which its intensity i decreases is proportional to i(t), where t represents the thickness of the medium (in feet). in clear seawater, the intensity 3 feet below the surface is 25% of the initial intensity i0 of the incident beam. what is the intensity of the beam "10" feet below the surface? (give your answer in terms of i0. round any constants or coefficients to five decimal places.)

Why does a collision with an airbag cause less damage than a collision with a steering wheel

Which form of pure carbon is so hard that it can be used in cutting tools?