Displacement with constant acceleration, Physics

Assignment Help:

In 1993, Ileana Salvador of Italy walked 3.0 km in under 12.0 min. Suppose that during 115 m of her walk Slavador is observed to steadily increase her speed from 4.20 m/s to 5.00 m/s. How long does this increase in speed take?

 

Solution:-

 

vi =+245km/h
aavg = -3.0m/s2

vf =vi -(0.200)vi


vi =(245km/h)(1h/3600s)(103m/1km)= +68.1m/s

vf =(1.000-0.200)vi =(0.800)(68.1m/s)=+54.5m/s

Δt=vf -vi /aavg

  = 54.5m/s - 68.1m/s / -3.0m/s2


  =-13.6m/s /-3.0 m/s2

  =  4.5s


Related Discussions:- Displacement with constant acceleration

Energy, What is potential and kinetic energy?

What is potential and kinetic energy?

Electric dipole, what should be the orientation of an electric dipole so th...

what should be the orientation of an electric dipole so that its potential enrgy is minimum

Optic fiber, why the reflective index of cladding is lower then in core of ...

why the reflective index of cladding is lower then in core of a fiber optic?

Friction, You have answered a question · 7 mins ago ''The force of friction...

You have answered a question · 7 mins ago ''The force of friction is required to move an object in space as there is no forece of attraction than how a satlite in space move around

How do you magnetize metal, How do you magnetize metal? You can rub a m...

How do you magnetize metal? You can rub a magnet with the metal in single direction for a bunch of times (the more the better), and that will magnetize it to some degree, but i

Explain about the homojunction laser in brief, Explain about the Homojuncti...

Explain about the Homojunction Laser in brief. Homojunction Laser: Assume that GaAs be doped with T providing n-type material and with Ge providing p-type material. In forwa

Experiment of heater, Heater Another form of heater can be made from an...

Heater Another form of heater can be made from an old oil tin. Iron wire is wrapped round a test tube and twisted to form a handle.

What is the wavelength of wave that propagates down a string, The speed at ...

The speed at which a wave propagates down a string is 300 meters per second.  If the frequency of this wave is 150 Hertz, what is the wavelength of this wave? Ans: The wavel

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd