Answer:
it represents group 2 and also it represents the group 3 stars
Explanation:
because i just took it and got it correct.
Answer:
magnetic force
Explanation:
when some one gets charged up by maybe static eletricity the person will sustain the energy and the energy will make a force field around the person which can and will attract paper and he will be attractive
<span>First lets determine the equation. Well at the top of the circle both the normal force and the weight are in the same direction. So we have Fnet=N+mg. Since this is a circular path the Fnet is also = to (mv^2)/r.
We convert the situation where the rock is no longer in contact with the bottom to terms relevant to the equation. So, what is a requirement for normal force? The object must be in contact with the surface, meaning it can't be in free fall. Realizing this means that the instant when the object does not touch the bucket is where the normal force = 0.
Now we have N+mg=(mv^2)/r where N=0 is the case we are interested in. This leaves 0+mg=(mv^2)/r
Solve for v:
v=(gr)^(1/2) or v=3.28m/s
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Answer: 2 m
Explanation:
We can solve this problem related to parabolic motion with the following equations:
(1)
(2)
Where:
is the ball's final jeight
is the ball's initial height
is the ball's initial vertical velocity, since the ball is horizontally projected
is the time
is the acceleration due gravity
is the ball's horizontal range
is the ball's initial horizontal velocity
Isolating from (1):
(3)
(4)
(5)
Substituting (5) in (2):
(6)
Finally we find how far horizontally the ball lands:
(7)
