Consider again the wedge in Question 6, but now assume a block is placed onto it as shown in Figure Q4.7. There is again no friction between the wedge and the table, and there is also no friction between the block and the wedge. Explain why in this case the wedge will be accelerated to the left. How does this situation differ from that in Question 6? Hint: Compare the free-body diagrams for the wedge in the two cases.
(reference problem 6)
Consider a wedge that rests on a horizontal table as shown in Figure Q4.6 and assume there is no friction between the wedge and the table. A force is now applied vertically as shown in the figure. You might expect this force will cause the wedge to move to the left. Explain why the wedge does not move, even though there is no friction between it and the table.
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