Answer This And 2 Others For 10k, Students Only - Education (14)

Answer This And 2 Others For 10k, Students Only - Education (14) - Nairaland

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Re: Answer This And 2 Others For 10k, Students Only by Nobody: 7:19pm On Aug 03, 2017

jnfoage:
An archer pulls back 0.75 m on a bow which has a stiffness of 200 N/m. The arrow weighs 50 g. What is the velocity of the arrow immediately after release?

47.4 m/s

Re: Answer This And 2 Others For 10k, Students Only by vaiper(m): 7:19pm On Aug 03, 2017

jnfoage:
An archer pulls back 0.75 m on a bow which has a stiffness of 200 N/m. The arrow weighs 50 g. What is the velocity of the arrow immediately after release?

d47.4m/s

Re: Answer This And 2 Others For 10k, Students Only by galaciousbabe(f): 7:19pm On Aug 03, 2017

47.4

Re: Answer This And 2 Others For 10k, Students Only by Drniyi4u(m): 7:19pm On Aug 03, 2017

(1/2) kx^2 , where k is the stiffness and x is the amount the spring is stretched, or compressed.
Therefore,
PE = (1/2)(200)(0.75) 2 = 56.25 J
The kinetic energy of a particle is:
(1/2) mv 2 , where m is the mass and v is the velocity.
The arrow can be treated as a particle since it is not rotating upon release.
Therefore, the kinetic energy KE of the arrow is:
KE = (1/2)(0.05) v 2
If we assume energy is conserved, then
PE = KE
Solving for the velocity of the arrow v we get
v = 47.4 m/s

Re: Answer This And 2 Others For 10k, Students Only by femo86(m): 7:19pm On Aug 03, 2017

Endomorph:
47.4ms

1 Like

Re: Answer This And 2 Others For 10k, Students Only by jnfoage(op): 7:19pm On Aug 03, 2017

Endomorph:
47.4ms

Computer. 2 point for you

1 Like

Re: Answer This And 2 Others For 10k, Students Only by Best978: 7:19pm On Aug 03, 2017

jnfoage:
An archer pulls back 0.75 m on a bow which has a stiffness of 200 N/m. The arrow weighs 50 g. What is the velocity of the arrow immediately after release?

47.4m/s

Re: Answer This And 2 Others For 10k, Students Only by dejt4u(m): 7:19pm On Aug 03, 2017

47.4m/s

Re: Answer This And 2 Others For 10k, Students Only by vaiper(m): 7:19pm On Aug 03, 2017

I give up

Re: Answer This And 2 Others For 10k, Students Only by galaciousbabe(f): 7:20pm On Aug 03, 2017

How many point for me na

Re: Answer This And 2 Others For 10k, Students Only by Basildvalour(m): 7:20pm On Aug 03, 2017

jnfoage:
An archer pulls back 0.75 m on a bow which has a stiffness of 200 N/m. The arrow weighs 50 g. What is the velocity of the arrow immediately after release?

V= 47.4m/s

Re: Answer This And 2 Others For 10k, Students Only by rollybest(m): 7:20pm On Aug 03, 2017

47.4m/s

Re: Answer This And 2 Others For 10k, Students Only by inschool(m): 7:20pm On Aug 03, 2017

jnfoage:
An archer pulls back 0.75 m on a bow which has a stiffness of 200 N/m. The arrow weighs 50 g. What is the velocity of the arrow immediately after release?

67.08m/s

Re: Answer This And 2 Others For 10k, Students Only by afo7219: 7:20pm On Aug 03, 2017

Purely for maths n physics students

Re: Answer This And 2 Others For 10k, Students Only by emmycool44: 7:20pm On Aug 03, 2017

47.4

Re: Answer This And 2 Others For 10k, Students Only by galaciousbabe(f): 7:21pm On Aug 03, 2017

vaiper:
I give up

Please don't!!! We are not losers

1 Like

Re: Answer This And 2 Others For 10k, Students Only by DrayZee: 7:21pm On Aug 03, 2017

vaiper:
I give up

No wahala.

Re: Answer This And 2 Others For 10k, Students Only by femo86(m): 7:21pm On Aug 03, 2017

You came second.....

1st commenter gets the point

But Op fit consider tongue

Re: Answer This And 2 Others For 10k, Students Only by rollybest(m): 7:21pm On Aug 03, 2017

rollybest:
47.4m/s

Nawaoo for some people before i go finish calculation people don post

Re: Answer This And 2 Others For 10k, Students Only by Nobody: 7:22pm On Aug 03, 2017

DrayZee:
David...
A safe distance...

Send my money sharply

wait for the remaining two questions

Re: Answer This And 2 Others For 10k, Students Only by lekelistik: 7:22pm On Aug 03, 2017*

Re: Answer This And 2 Others For 10k, Students Only by rollybest(m): 7:23pm On Aug 03, 2017

vaiper:
I give up

my brother no be small thing oo

Re: Answer This And 2 Others For 10k, Students Only by femo86(m): 7:23pm On Aug 03, 2017

Don't give up oooo

Abeg....keep trying...

Believe that God go pick up grin

Re: Answer This And 2 Others For 10k, Students Only by inschool(m): 7:23pm On Aug 03, 2017

some people are booking space with a dot
before posting an answer, that is not good

Re: Answer This And 2 Others For 10k, Students Only by DrayZee: 7:23pm On Aug 03, 2017

Giantslayer:
wait for the remaining two questions

Lol.
You serious bro?

Re: Answer This And 2 Others For 10k, Students Only by kingsilly(m): 7:23pm On Aug 03, 2017

Drniyi4u:
(1/2) kx^2 , where k is the stiffness and x is the amount the spring is stretched, or compressed.
Therefore,
PE = (1/2)(200)(0.75) 2 = 56.25 J
The kinetic energy of a particle is:
(1/2) mv 2 , where m is the mass and v is the velocity.
The arrow can be treated as a particle since it is not rotating upon release.
Therefore, the kinetic energy KE of the arrow is:
KE = (1/2)(0.05) v 2
If we assume energy is conserved, then
PE = KE
Solving for the velocity of the arrow v we get
v = 47.4 m/s

Take it easy

1 Like

Re: Answer This And 2 Others For 10k, Students Only by Endomorph: 7:23pm On Aug 03, 2017

jnfoage:
Computer. 2 point for you

phew.......one more to go

Re: Answer This And 2 Others For 10k, Students Only by DrayZee: 7:24pm On Aug 03, 2017

femo86:
You came second.....

1st commenter gets the point

But Op fit consider

I was second.
Endomorph was 1st..

Re: Answer This And 2 Others For 10k, Students Only by galaciousbabe(f): 7:24pm On Aug 03, 2017

femo86:
You came second.....

1st commenter gets the point

But Op fit consider

I serve a living God. I must make it.

Re: Answer This And 2 Others For 10k, Students Only by femo86(m): 7:24pm On Aug 03, 2017

inschool:
some people are booking space with a dot
before posting an answer, that is not good

No one is doing that...

And I'm always watching how it goes...

Except if they posted the wrong answer and went to modify but b4 then.....I don spot the 1st

Re: Answer This And 2 Others For 10k, Students Only by Drniyi4u(m): 7:24pm On Aug 03, 2017

kingsilly:
Take it easy

Lol

Re: Answer This And 2 Others For 10k, Students Only by jnfoage(op): 7:24pm On Aug 03, 2017

inschool:
some people are booking space with a dot
before posting an answer, that is not good

I dey catch dem na. I catch one now, check.

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