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A 2.50 kg block is pushed against a spring with negligible mass and force constant of 450 N/m, compressing the spring to 0.230 m. When the block is released, it moved along a frictionless, horizontal surface and then up a frictionless incline with slope 35.0° (as shown in Figure 3.9). (a) What is the speed of the block as it slides along the horizontal surface after having left the spring? (b) How far does the block travel up the incline before starting to slide back down? 0.23 m 2.5 kg 35 Fig. 3.9

A 2.50 kg block is pushed against a spring with negligible mass and force constant of 450 N/m, compressing the spring to 0.230 m. When the block is released, it moved along a frictionless, horizontal surface and then up a frictionless incline with slope 35.0° (as shown in Figure 3.9). (a) What is the speed of the block as it slides along the horizontal surface after having left the spring? (b) How far does the block travel up the incline before starting to slide back down? 0.23 m 2.5 kg 35 Fig. 3.9

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7. A 2.50 kg block is pushed against a spring with negligible mass and force constant of 450 N/m, compressing the spring to 0.230 m. When the block is released, it moved along a frictionless, horizontal surface and then up a frictionless incline with slope 35.0° (as shown in Figure 3.9). (a) What is the speed of the block as it slides along the horizontal surface after having left the spring? (b) How far does the block travel up the incline before starting to slide back down? 0.23 m 2.5 kg 135 Fig. 3.9 8. A 62.0 kg skier starts from rest at the top of a ski slope 55.0 m high. (a) If the frictional forces do -9.80 kj of work on her as she descends, how fast is she going at the bottom of the slope? (b) Now moving horizontally, the skier crosses an 85.0 m wide patch of soft snow, where uk = 0.31. How fast is she moving after crossing the patch?
Transcribed Image Text:7. A 2.50 kg block is pushed against a spring with negligible mass and force constant of 450 N/m, compressing the spring to 0.230 m. When the block is released, it moved along a frictionless, horizontal surface and then up a frictionless incline with slope 35.0° (as shown in Figure 3.9). (a) What is the speed of the block as it slides along the horizontal surface after having left the spring? (b) How far does the block travel up the incline before starting to slide back down? 0.23 m 2.5 kg 135 Fig. 3.9 8. A 62.0 kg skier starts from rest at the top of a ski slope 55.0 m high. (a) If the frictional forces do -9.80 kj of work on her as she descends, how fast is she going at the bottom of the slope? (b) Now moving horizontally, the skier crosses an 85.0 m wide patch of soft snow, where uk = 0.31. How fast is she moving after crossing the patch?
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