During a soccer game, a player grabs and holds an opponent's shirt outside of the penalty box. After the foul is called, what ki
2 answers:
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Answer:
Second Trial satisfy principle of conservation of momentum
Explanation:
Given mass of ball A and ball B
Let mass of ball and
Final velocity of ball
Final velocity of ball
initial velocity of ball
Initial velocity of ball
Momentum after collision
Momentum before collision
Conservation of momentum in a closed system states that, moment before collision should be equal to moment after collision.
Now,
Plugging each trial in this equation we get,
First Trial
momentum before collision moment after collision
Second Trial
moment before collision moment after collision
Third Trial
momentum before collision moment after collision
Fourth Trial
momentum before collision moment after collision
We can see only Trial- 2 shows the conservation of momentum in a closed system.
The acceleration of an object in free fall is
Explanation:
We can solve the problem by using Newton's second law of motion, which states that:
where
F is the net force on an object
m is the mass of the object
a is its acceleration
For the object in this problem, we have:
m = 9.9 kg is its mass
F = 97.02 N is the net force on the object
So, we can rearrange the equation to find its acceleration:
This value is actually known as acceleration of gravity (g), and it is the acceleration that any object in free fall has near the Earth's surface, regardless of its mass.
Learn more about Newton's second law here:
And about free fall:
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