6. A 70.0 kg pole- vaulter converts the kinetic energy, of running at ground level, into potential energy to clear the crossbar at a height of 4.0 m above the ground. What is the minimum velocity that he must have had at takeoff (while on the ground) to clear the bar (minimum would be when velocity at the top was zero – you could still be moving forward at the top, but this would require more velocity at the beginning)?

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Author:William Moebs, Samuel J. Ling, Jeff Sanny
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Chapter7: Work And Kinetic Energy
Section: Chapter Questions
Problem 63P: A small object is placed at the top of an incline that is essentially frictionless. The object...
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I need help with this physics question #6
6. A 70.0 kg pole-
vaulter converts the
kinetic energy, of
running at ground
level, into potential
energy to clear the
crossbar at a height of
4.0 m above the
ground. What is the
minimum velocity that
he must have had at
takeoff (while on the
ground) to clear the
bar (minimum would
be when velocity at
the top was zero –
you could still be
moving forward at the
top, but this would
require more velocity
at the beginning)?
Transcribed Image Text:6. A 70.0 kg pole- vaulter converts the kinetic energy, of running at ground level, into potential energy to clear the crossbar at a height of 4.0 m above the ground. What is the minimum velocity that he must have had at takeoff (while on the ground) to clear the bar (minimum would be when velocity at the top was zero – you could still be moving forward at the top, but this would require more velocity at the beginning)?
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