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

Physics question with infinite nonconducting uniform, Physics question with...

Physics question with infinite nonconducting uniformly charged planes? Two infinite non conducting uniformly charged planes lie parallel to each other and to the yx plane. One is

#title.electronics., actually in my college we are going to celebrate depar...

actually in my college we are going to celebrate department function for physics we have to keep demos in physics for a project but i don''t have any idea will u help me

Show phenomenon of the formation of the newtons rings, The phenomenon of th...

The phenomenon of the formation of the Newton's rings can be explained on the basis of wave theory of light. When a light ray iP1 from an extended monochromatic light source S is a

Lens, types of lenses and their explanation

types of lenses and their explanation

Parallel forces, what are unlike parallel forces with example?

what are unlike parallel forces with example?

Potential barrier, Potential barrier One either side of the junction, t...

Potential barrier One either side of the junction, the region ‘D' becomes free from mobile charge carriers. That is on n-type side of D, no free electrons exist and on p-type s

How many days would there be in an earth year, If a meteorite hit the Earth...

If a meteorite hit the Earth and moved it 2.41x 10 10 m closer to Venus, How many days would there be in an Earth year?

Describe stoke''s formula, Stokes' Formula: When a spherical object falls ...

Stokes' Formula: When a spherical object falls by the fluid, layer in immediate touch with it, sticks to it and goes along with the object with the same speed. The layer next to i

Viscosity of liquid, How to determine the co efficient of viscosity of liqu...

How to determine the co efficient of viscosity of liquid by capillary flow method?

Friction, why friction is called a necessery evil?

why friction is called a necessery evil?

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