padronvaleria1428 padronvaleria1428

10-06-2020
Mathematics

contestada

How much time is needed for a boy on roller skates to slow down from 17.4
m/s to 9.11 m/s if he covers 45.0 m?

Respuesta :

surjithayer10 surjithayer10

10-06-2020

Answer:

Step-by-step explanation:

v²-u²=2as

9.11²-17.4²=2a×45

a=-(17.4²-9.11²)/90=-(302.76-82.9921)/90=-219.7679/90 m/s²

v=u+at

9.11=17.4-219.7679/90 t

9.11-17.4=-219.7679/90t

-8.29×90=-219.7679t

t=-746.1/-219.7679≈3.395 s

Answer Link

Otras preguntas

Explain how the following democratic principles can ensure good governance:Accountability

Can someone explained what i am supposed to do in this picture.

Of the people who fished at Clearwater Park today, 56 had a fishing license, and 14 did not. Of the people who fished at Mountain View Park today, 72 had

You arrive at an intersection with traffic lights that are not working because of a power outage. What do you do?

In what year did the House Un-American Activities Committee investigate the movie industry in an attempt to root out communist sympathizers? A. 1947 B. 1950 C.

When you step out of the bright sunshine into a dark movie theater, your vision gradually adjusts to the relative gloom. This process is known as _______ adapta

I'm new to this site. So can anyone tell me about it?

Graphic designers sometimes must adjust the spacing between letters so that the result looks right to them. This is called A. justifying. B. optical spacing. C

an eagle has a mass of 8 kg and is flying 85 m above he ground with a speed of 20 m/s. what is the total mechanical energy of the eagle

Critically discuss the elements of a successful business