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A ball rolls off the edge of a horizontal table top 1.25 m high. If it strikes the floor at a point 1.6 m horizontal away from the edge of the table. The speed with which it leaves the table is: g=10m/sec2

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a

3 m/sec2

b

3.2 m/sec2

c

3.4 m/sec2

d

3.8 m/sec2

answer is B.

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Detailed Solution

given height of the table=h=1.25m; range=R=1.6m; acceleration due to gravity=g=10m/s2; substituting in the formula range =R=U2hg ⇒1.6=U2×1.2510 ⇒U=3.2 m/sec

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A ball rolls off the edge of a horizontal table top 1.25 m high. If it strikes the floor at a point 1.6 m horizontal away from the edge of the table. The speed with which it leaves the table is: g=10m/sec2