Aanchal C.

asked • 06/23/15

physics velocity help needed please

A stuntman plans to run across a roof top and then horizontally off it to a land  on the roof of the next building . The roof of the next building is 4.9 m below the first one and 6.2 m away from it .  What should be his minimum roof top speed , in m/s , so that he can successfully make a jump ?
 
  1. 6.2
  2. 4.9
  3. 4.0
  4. 3.1 
 

1 Expert Answer

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Muhammad C. answered • 06/23/15

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Muhammad C.

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If gravity is 9.8m/s^2, then it would be take the stuntman 1 second to drop 4.9m if we use the general distance equation s = v0t + .5at^2. That means the stuntman would have that same second to travel horizontally 6.2 meters so his smallest velocity would have to be 6.2 m/s.
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06/23/15

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