answer the question

4. A student pushes a 5.0 kg box against a horizontal spring causing the spring (k = 50 N/m) to compress 0.15 m. a) How much work was done on the spring? b) What it the final velocity of the box after the student releases the system? (assume negligible friction) 5. A student connects a 0.5 kg box to a slinky. The student then releases the box allowing it to fall. How far will the spring stretch if the spring constant is 3.0 N/kg? 6. A student pushes a 20 kg box with a force of 100 N at an angle of 60 below the horizontal causing the box to move at a constant speed. The student pushes the box for a distance of 8.0 m. a) What is the work done by the student on the box? b) What is the work done by the box on the ground