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Question: the figure below shows a skateboarder descending a ramp the...

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The figure below shows a skateboarder descending a ramp. The skateboarder starts from rest at the top of the ramp at A and leaves the ramp at B horizontally with a velocity v. 

(a) State the energy changes that take place as the skateboarder moves from A to B. 

 

 

 

 (b) In going from A to B the skateboarder’s centre of gravity descends a vertical height of 1.5 m. Calculate the horizontal velocity, v, stating an assumption that you make. 

 

 

(c) Explain why the acceleration decreases as the skateboarder moves from A to B. 

 

 

 

 (d) After leaving the ramp at B the skateboarder lands on the ground at C 0.42 s later. Calculate for the skateboarder 

                (i) the horizontal distance travelled between B and C, 

 

 

                 (ii) the vertical component of the velocity immediately before impact at C, 

 

 

                 (iii) the magnitude of the resultant velocity immediately before impact at C.  

 

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