8. A 55-kg skateboarder enters a ramp moving horizontally with a speed of 6.5 m/s, and leaves the ramp moving vertically with a speed of 4.1 m/s. (A) Find the height of the ramp, assuming no energy loss to frictional forces. (B) What is the skateboarder's maximum helght above the bottom of the ramp?
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- A 50 kg object has 1,800 J of potential energy when it is released and allowed to fall to the ground. At what speed will it hit the ground? Assume negligible frictional forces.A 27.0-kg child on a 4.00-m-long swing is released from rest when the ropes of the swing make an angle of 35.0° with the vertical. (a) Neglecting friction, find the child's speed at the lowest position. m/s (b) If the actual speed of the child at the lowest position is 3.30 m/s, what is the mechanical energy lost due to friction? Need Help? Read It2
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