Displacement with constant acceleration, Physics

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

Posted Date: 10/4/2012 12:08:46 AM | Location : United States







Related Discussions:- Displacement with constant acceleration, Assignment Help, Ask Question on Displacement with constant acceleration, Get Answer, Expert's Help, Displacement with constant acceleration Discussions

Write discussion on Displacement with constant acceleration
Your posts are moderated
Related Questions
how to study the earth''s magnetic field using a tangent galvanometer?

Q. What is the force essential to accelerate a mass of one kilogram one meter per second per second? Answer:- Fundamentally you have defined the Newton. Force is the ve

explain the refractive index of the transparent liquid using prism spectrometer?

(i) Value of vibration of a particle is described as the number of vibrations done by particle in one second. (ii) It is the value of total wavelengths traversed by the wave in

Refractive Astronomical Telescope: It is an optical instrument which is used to see heavenly bodies such as stars, moon and planets is known as telescope. Astronomical teles

Similarities in Construction of MOSFET and JFET (i)  JFET is a three terminal semiconductor device (source, drain and gate) in which current conduction is by majority carriers

One  scientist wants to put an 100kg experimental package in orbit around the Earth. The cost of deployment depends on the amount of more extra energy it takes to get it into the r

2. The dipole in problem is removed and the space between plates is filled with Cu of conductivity σ (look up the value). (a) Derive an expression for the current density betwee

Trojan points: It is L4 & L5, the two dynamically stable Lagrange points (under certain conditions). Trojan satellites: This is the satellites that orbit a body at o

conditions of equilibrium for concurrent force system