Block with a mass of 1 kg strikes a horizontal spring with a spring constant of 2 N/m. The block presses the spring 4 m from its normal position. If we consider the coefficient of kinetic friction between the block and the horizontal surface is 0.25, what is the speed of the block when it starts hitting the spring?

A cart of mass 400 kg traveling at a speed of 15 m/s is struck by a 50-L/s jet of water flowing at 40 m/s. a. If the water jet goes in the same direction as the cart, what is the applied acceleration force? b.

The 20kg box illustrated in the diagram is transported on a platform which is attached to two identical, parallel arms. The arms rotate in the indicated direction at the given constant rate. Assuming that the box does not slide relative to the platform,find the static friction coefficient over the contact surface between the box and the platform. Use the scalar method to solve this problem

A circular plate with radius 8 m is submerged vertically in water as shown. Express the hydrostatic force against one side of the plate as an integral and evaluate it. (Round your answer to the nearest whole number. Use 9.8 m/s² for the acceleration due to gravity. Recall that the weight density of water is 1000 kg/m³.) -[X Need Help? Road It dy= 2 m 8 m N