Equal forces push together the two equal-mass boxes shown in the figure. The table surface is frictionless. Both boxes have the same initial speed, and later both have the same slower speed. Let the system consist of the boxes and the spring. Part A Is the work done on the system positive, negative, or zero? Explain.Part B Is delta E, the change in the system's energy, positive, negative, or zero? Explain.

Consider the following statements about the blocks shown in the diagram that are being pushed by a constant force on a frictionless table.A. All blocks move with the same accelerationB. The net force on each block is the sameWhich of these statements are/is correctA A only B B only C Both A and B D Neither A nor B

Two identical boxes containing different masses are sliding with the same initial speed on thesame horizontal surface. They both come to rest under the influence of the frictional force ofthe surface. How do the frictional force and acceleration of the boxes compare

A light spring with force constant 3.85 N/m is compressed by 8.00 cm as it is heldbetween a 0.250 kg block on the left and a 0.500 kg block on the right, both resting ona horizontal surface. The spring exerts a force on each block, tending to push the blocksapart. The blocks are simultaneously released from rest. Find the acceleration withwhich each block starts to move, given that the coefficient of kinetic friction betweeneach block and the surface is:(a) 0(b) 0.100(c) 0.462

Block A𝐴 in (Figure 1) has mass 1.00 kgkg, and block B𝐵 has mass 3.00 kgkg. The blocks are forced together, compressing a spring S𝑆 between them; then the system is released from rest on a level, frictionless surface. The spring, which has negligible mass, is not fastened to either block and drops to the surface after it has expanded. Block B𝐵 acquires a speed of 1.30 m/sm/s.Figure1 of 1Part AWhat is the final speed of block A𝐴?Express your answer in meters per second.Activate to select the appropriates template from the following choices. Operate up and down arrow for selection and press enter to choose the input value typeActivate to select the appropriates symbol from the following choices. Operate up and down arrow for selection and press enter to choose the input value typev𝑣 =nothingm/sm/sSubmitRequest AnswerPart BHow much potential energy was stored in the compressed spring?Express your answer in joules.Activate to select the appropriates template from the following choices. Operate up and down arrow for selection and press enter to choose the input value typeActivate to select the appropriates symbol from the following choices. Operate up and down arrow for selection and press enter to choose the input value typeU𝑈 =

A worker pushing a 35.0 kg wooden crate at a constant speed for 12.0 m along a woodfloor does 350 J of work by applying a constant horizontal force of magnitudeF on the crate.(a) Determine the value of F.(b) If the worker now applies a force greater than F, describe the subsequent motion ofthe crate.(c) Describe what would happen to the crate if the applied force is less than F.