It is the same if a white father and a white mother give birth to a black kid, so the mother accuses the father for having (let's say mating) with a black women.
The closer you are to the ground the more accurate you'll be. That's why most snipers are in the "prone" position.
When air resistance is ignored, initial velocity of the projectile affect the range and maximum height of the projectile.
Projectile is a missile designed to be fired from a rocket or gun.
A projectile is the object that is propelled by the application of an external force and then moves freely under the influence of gravity and air resistance.
The range is defined as the distance between the launch point and the point where the projectile hits the ground.
The height from the ground at the top most position of projectile is referred to as maximum height.
When air resistance is ignored, initial velocity of the projectile affect the range and maximum height of the projectile.
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Answer:
Value of acceleration in each case is 
Explanation:
According to newton's law :
...equation 1.
In the given case, 
Force by both the children - Friction force .
Putting value of F in equation 1.
Now, if friction force = 20 N.
Therefore, 
Putting value of F and a in equation 1.
Hence , this is the required solution.
