The answer is 17 m because you have to add the 15 m and the 8 m together to get the answer so it will be like this 17x17 = 15x15 + 8x8 got it?
This problem is relatively simple, in order to solve this problem the only formula you need to know is the formula for friction, which is:
<span>Ff = UsN </span>
<span>where Us is the coefficient of static friction and N is the normal force. </span>
<span>In order to get the crate moving you must first apply enough force to overcome the static friction: </span>
<span>Fapplied = Ff </span>
<span>Since Fapplied = 43 Newtons: </span>
<span>Fapplied = Ff = 43 = UsN </span>
<span>and it was given that Us = 0.11, so all you have to do is isolate N by dividing both sides by 0.11 </span>
<span>43/0.11 = N = 390.9 which is approximately 391 or C. 3.9x10^2</span>
Answer:
C) less than 129 lb.
Explanation:
Let the elevator be slowing up with magnitude of a . That means it is accelerating downwards with magnitude a .
If R be the reaction force
For the elevator is going downwards with acceleration a
mg - R = ma
R = mg - ma
R measures its apparent weight . Spring scale will measure his apparent weight.
So its apparent weight is less than 129 lb .
Answer:
relative vorticity is -0.868 ×
s-1
Explanation:
given data
air parcel at latitude = 18◦N
relative vorticity = 5.8 × 10^−5 s−1
to find out
relative vorticity
solution
we will apply here conservation of vorticity that is
ζ + f = constant
we know ζ initial = 2Ωsin(5π/18)
and f initial = 5.8 ×
and f final = 2Ωsin(π/18)
and here angular frequency Ω = 0.7272 ×
s-1
its mean
ζ initial - ζ final = f final - f initial
so
ζ final = ζ initial - f final + f initial
ζ final = - 2Ωsin(5π/18) + ( 2Ωsin(π/18) + 5.8 ×
)
ζ final = - 2(0.7272 ×
) sin(5π/18) + ( 2(0.7272 ×
)sin(π/18) + 5.8 ×
)
ζ final = -0.868 ×
s-1
so relative vorticity is -0.868 ×
s-1