What is her average velocity for the entire trip

Reference no: EM13523028

A physics professor, equipped with a rocket backpack, steps out of a helicopter at an altitude of 617 m with zero initial velocity. (Neglect air resistance.) For 7.9 s, she falls freely. At that time, she fires her rockets and slows her rate of descent at 14 m/s2 until her rate of descent reaches 5.4 m/s. At this point, she adjusts her rocket engine controls to maintain that rate of descent until she reaches the ground.

(a) What is her speed at the end of the first 7.9 s?

(b) What is the duration of her slowing-down period?

(d) How much time is required for the entire trip from the helicopter to the ground?

(e) What is her average velocity for the entire trip?

Reference no: EM13523028

Questions Cloud

On the edge-working for eli lilly and company : Before a newly discovered drug is approved for sale, the U. S. Food and Drug Administration ( FDA) requires that it be tested on healthy humans to determine whether it has dangerous side effects. Unfortunately, most healthy people will not take an..

Find how long after its release does the mailbag : The height of a helicopter above the ground is given by h = 3.10t3, where h is in meters and t is in seconds. How long after its release does the mailbag reach the ground

Explain what''s the unknown molar mass : Benzene's vapor pressure is normally 0.930 atm. A soln of 20.0g unknown molecular solute and 78.11 g benzene has a vapor pressure of 0.900 atm. What's the unknown molar mass. Benzene molar mass= 78.11 g/mole

A research project related to research of the professional : A research project related to research of the Professional of Conduct

What is her average velocity for the entire trip : A physics professor, equipped with a rocket backpack, steps out of a helicopter at an altitude of 617 m with zero initial velocity. (Neglect air resistance.) What is her average velocity for the entire trip

Explain what pressure would the water have to be bottled : Suppose you could buy a bottle of water claiming that it contains 76 ppm oxygen. The law constant for water is k = 1.2 x 10 -3 M atm -1. What pressure would the water have to be bottled under to obtain the claimed concentration

Give hobbess responses to aristotles rejections : Give three different reasons why Aristotle would reject Hobbes's argument for why man should be moral and give Hobbes's responses to Aristotle's rejections?

Define the new pressure p2 inside the container : If the container is compressed to 2.40 \rm L and the temperature is increased to 36\, \rm ^{\circ}C, what is the new pressure, P_2, inside the container

Calculate the resonance frequency and transfer function : Calculate the resonance frequency, fo of the circuit and calculate the cut-off frequencies f1 and f2 of the circuit - Calculate the transfer function

User Account

All Pages