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

What are the particles that make up an atom, Q. Illustrate what are the thr...

Q. Illustrate what are the three particles that make up an atom? Answer:- Atoms are conjured of neutrons, protons, and electrons. The protons as well as neutrons are found

Describe how the laser transitions are arisen, Describe how the laser trans...

Describe how the laser transitions are arisen. The given energy level diagram could describe how the laser transitions arise. Collisions in between the He atoms and Ne

Explain inertia, Inertia: the resistance an object has to a alter in its s...

Inertia: the resistance an object has to a alter in its state of motion. Newton's first law of motion declares that force is NOT required to keep an object in motion. Slide

What do you mean by magnetic induction? , Q) What do u mean by magnetic ind...

Q) What do u mean by magnetic induction? what is the dimensioin of magnetic induction? Ans) Electromagnetic induction is the manufacture of a potential difference (voltage) acro

Ultrasonic, how faster ultrsonic waves will travel in solids.

how faster ultrsonic waves will travel in solids.

Illustrate double-beam oscilloscope, For the double-beam oscilloscope displ...

For the double-beam oscilloscope displays shown in Figure, determine (a) their frequency (b) their r.m.s. values (c) their phase difference. The 'time/cm' switch is on 10

Determine the current flowing in the conductor, A 25cm long conductor moves...

A 25cm long conductor moves at a uniform speed of 8m/s by a uniform magnetic field of flux density 1.2T.  Verify the current flowing in the conductor when (a) Its ends are o

Explain plane transmission grating, In plane transmission grating the width...

In plane transmission grating the width of the each slit is same to half of the opaque portion. Which order of spectra will be absent?

What angle will the maximum horizontal distance be attained, Q. For project...

Q. For projectiles fired at identical speeds but a variety of angles from the ground, neglecting air resistance also the curvature of the Earth at what angle will the maximum horiz

Rutherford’s gold - foil experiment , An α particle is a positively charged...

An α particle is a positively charged particle. Rutherford observed the behaviour of these particles when they approach the interior of the atoms as shown in fig.  Rutherford ob

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