Answer: 1.5 m/s
Explanation:
In this problem we have to find the velocity of the second billiard ball after the collision.
According to the conservation of momentum law:
<em>"If two objects or bodies are in a closed system and both collide, the total momentum of these two objects before the collision will be the same as the total momentum of these same two objects after the collision".</em>
This means the initial momentum must be equal to the final momentum :
(1)
Where:
(2)
(3)
are the masses of each ball
is the initial velocity of ball 1 (in the right direction)
is the initial velocity of ball 2 (in the opposite direction)
is the final velocity of ball 1 (in the opposite direction)
is the final velocity of ball 2
Substituting (2) and (3) in (1):
(4)
Isolating and remembering :
(5)
(6)
Finally:
This is the final velocity of ball 2, directed to the right
Not all forms of radiation is safe for humans
Answer: v=11.3 m/s
Explanation:
ok the velocity of an object in free fall is given by the equation :
v=v0-gt, where v0 is the original velocity, g is the gravitational constant (9.8 m/s^2) and t is the time.
so, we substitute values into this equation. v=35.8-9.8*2.5; v=11.3 m/s
Answer:
3
Explanation:
mass number minus the atomic number
35-32
3