"A" I think, not sure tho.
Answer:
Explanation:
You need to look at this in 3 separate stages, and then sum thedistance from each stage:
Stage 1)
a=2
t=20
=0
We also need to find the final velocity
Stage 2)
a=0
v=40
t=20
Stage 3)
a=-3
=40
=0
So the total distance is
Animals have a food chain. (sorry for my bad English)
Answer:
The magnitude of the tension in the cable, T is 1,064.315 N
Explanation:
Here we have
Length of beam = 4.0 m
Weight = 200 N
Center of mass of uniform beam = mid-span = 2.0 m
Point of attachment of cable = Beam end = 4.0 m
Angle of cable = 53° with the horizontal
Tension in cable = T
Point at which person stands = 1.50 m from wall
Weight of person = 350 N
Therefore,
Taking moment about the wall, we have
∑Clockwise moments = ∑Anticlockwise moments
T×sin(53) = 350×1.5 + 200×2
T = 850/sin(53) = 1,064.315 N.
The reference point is wherever you want it to be. If you define it
as the tip of the nose of one of the people, that's fine. Alternately,
it could be one of the claws on the dog across the street, or a leaf
on the tree that's directly over the people.
Since you're planning on describing the motion of the car, you
probably don't want to pick the car itself as the reference point.
If you did that, then the car would never move, but everything else
would.