Answer:
Zero; no force is required to keep it going
Explanation:
Since the cannon ball is fired into frictionless space, there will be nothing to stop it, so it will keep going and going. 
 
        
             
        
        
        
Answer:
0 J
Explanation:
Work is the product of force and distance in the direction of force.
The formula is ; Work = Force * Distance 
Given that :
Force = 400 N
Distance = 0 meters
Work = 400 * 0 = 0 J
No work was done because the boulder did not move.
 
        
             
        
        
        
Answer:
Explanation:
The forces exerted by each mass is best understood in terms of their momentum. 
Momentum is a sort of compelling force or impulse. It is given as: 
                    Momentum  =  mass x velocity
Let us consider the momentum of the balls;
Substance C; 
     Mass  = 1kg 
      Velocity  = 5m/s
     Momentum of C = 1 x 5  = 5kgm/s 
Substance D: 
       Mass  = 100kg 
       Velocity  = 5m/s
      Momentum of D  = 100kg x 5m/s  = 500kgm/s
Body D has a higher momentum compared to Body C. This suggests that body D will exert a higher force than C when they collide. 
The higher the momentum, the more the force of impact it has. 
 
        
             
        
        
        
<span>the arrangement of the outer planets is 
</span>1. Mercury 
<span>2. Venus </span>
<span>3. Earth </span>
<span>4. Mars </span>
<span>5. Jupiter </span>
<span>6. Saturn </span>
<span>7. Uranus </span>
8. Neptune
the inner most of the outer plannets is jupitor it is followed by saturn uranus and neptune
        
             
        
        
        
Explanation:
We'll need two equations.
v² = v₀² + 2a(x - x₀)
where v is the final velocity, v₀ is the initial velocity, a is the acceleration, x is the final position, and x₀ is the initial position.
x = x₀ + ½ (v + v₀)t
where t is time.
Given:
v = 47.5 m/s
v₀ = 34.3 m/s
x - x₀ = 40100 m
Find: a and t
(47.5)² = (34.3)² + 2a(40100)
a = 0.0135 m/s²
40100 = ½ (47.5 + 34.3)t
t = 980 s