anonymous
  • anonymous
a ball is thrown vertically downward with a speed of 3.0m/s.find its speed when it has travelled a distance of 5m.
Physics
jamiebookeater
  • jamiebookeater
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y2o2
  • y2o2
you have to state the gravitational acceleration.
anonymous
  • anonymous
i think the gravitational acceleration is 9.81m/s^2. a question is given like that without state the gravitational acceleration.
y2o2
  • y2o2
So you'll use the third Equation of motion: v² = u² + 2as so v² = 3² + 2*9.81*5 =107.1 v = sqrt(v²) = 10.349 m/s

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anonymous
  • anonymous
tq very much..i'm appreciate it..
y2o2
  • y2o2
I'm glade it helped :)

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