Assume that the small-massed particle is  and the heavier mass particle is
 and the heavier mass particle is  .
.
Now, by momentum conservation and energy conservation:
    
    
Now, there are 2 solutions but, one of them is useless to this question's main point so I excluded that point. Ask me in the comments if you want the excluded solution too.
    
So now, we see that  and
 and  . So therefore, the smaller mass recoils out.
. So therefore, the smaller mass recoils out.
Hope this helps you!
Bye!
 
        
             
        
        
        
1).  Sequence from the Sun:
       Inner planets:
                 Mercury
                 Venus 
                 Earth 
                 Mars
       Outer planets:
                 Jupiter
                 Saturn
                 Uranus
                 Neptune
             
2).  The farther a planet is from the sun, the longer it takes
to orbit the sun.  Mercury ... 88 days.  Earth ... 365 days.
                           Jupiter ... 12 years.    Neptune ... 165 years.
3).  Mercury & Venus ... no moons
      Earth - 1
      Mars - 2
     Jupiter -  more than 65
4).  Mercury ... cratered, no atmosphere
      Venus ... cratered, thick cloudy atmosphere 
       Mars ... dry, cratered, slight atmosphere, like 1% or Earth's
       
       Jupiter, Saturn, Uranus, Neptune
                     We can't see any surface.  If any of them even 
                     HAS a surface, it's thousands of miles under a 
                     thick atmosphere of methane gas.
5).  Missing from the list
6).  Here's a list from the biggest planet to the smallest one.
The numbers in parentheses are the radius of the planet --
half of the diameter:
Jupiter (69,911 km / 43,441 miles) – 1,120% the size of Earth
Saturn (58,232 km / 36,184 miles) – 945% the size of Earth
Uranus (25,362 km / 15,759 miles) – 400% the size of Earth
Neptune (24,622 km / 15,299 miles) – 388% the size of Earth
Earth (6,371 km / 3,959 miles)
Venus (6,052 km / 3,761 miles) – 95% the size of Earth
Mars (3,390 km / 2,460 miles) – 53% the size of Earth
Mercury (2,440 km / 1,516 miles) – 38% the size of Earth
7). At least seven of the planets rotate in the same direction.  
There's something different about one of them ... it may be Uranus 
but I'm not sure.  You'll have to look this up.
8).  Saturn has the famous rings, that you can almost see 
with only binoculars.
Spacecraft sent to observe the outer planets have detected 
very thin rings around Uranus and Neptune.
9).  Included in #6.
10).  I don't have complete info.  Generally, the closer the planet 
is to the sun, the hotter it is.  But there are a few exceptions.  
I think Venus ... the second one from the sun, is actually hotter 
than Mercury.  
11).  Just about every language has its own name for each planet.
12).  "Terrestrial" means "like Earth" ("Terra").
The terrestrial planets are the ones that have solid surfaces
and are made of rock.
Mercury, Venus, Earth, and Mars.
13).  "Jovian" means "like Jupiter".
Either no solid surface, or very small, inside a big deep gas ball.  
Jupiter, Saturn, Uranus, Neptune.
        
             
        
        
        
Answer:

Explanation:
Given data
Mass m=67.0 kg
Final Speed vf=8.00 m/s
Initial Speed vi=2.00 m/s
Distance d=25.0 m
Force F=30.0 N
From work-energy theorem we know that the work done equals the change in kinetic energy
W=ΔK=Kf-Ki=1/2mvf²-1/2mvi²
And

So

and we know that the force the sprinter exerted Fsprinter the force of the headwind Fwind=30.0N
So
 
  
 
        
                    
             
        
        
        
Thank you for posting
your question here at brainly. Feel free to ask more questions.
 
<span><span>The
best and most correct answer among the choices provided by the question is  </span>B.-2.71 V.</span>
 
Mg2+(aq) + 2e- -> Mg(s) E=-2.37 V
 
Cu2+(aq) + 2e- -> Cu(s) E =+ 0.34 V
 
Since Cu is acting as the anode, the equation needs to be
reversed.
 
Cu(s) -> Cu2+(aq) + 2e- E =- 0.34 V
 
Ecell= -2.37 V+ (- 0.34 V) = -2.71 V
 
<span><span>
</span><span>Hope my answer would be a great help for you. </span> </span>
<span> </span>