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Author Question: A pole vaulter clears 3.98 m. With what speed does he strike the mat in the landing area? a. 78.0 ... (Read 127 times)

panfilo

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  • Posts: 572
on: Jul 28, 2018
A pole vaulter clears 3.98 m. With what speed does he strike the mat in the landing area?
 a. 78.0 m/s
  b. 6.25 m/s
  c. 8.83 m/s
  d. 4.42 m/s
  e. 0.226 m/s

Question 2

An airliner with mass 90 000 kg is flying at 900 km/h at a height of 15.0 km. What is its total energy (kinetic + potential) if the total was 0 when the airliner was at rest on the ground?
 a. 5.0E+10 J
  b. 3.6E+10 J
  c. 1.3E+10 J
  d. zero
  e. 1.6E+10 J


ong527

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  • Posts: 285
Reply #1 on: Jul 28, 2018
Answer to Question 1

c

Answer to Question 2

e


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