Answer:through wires or cables
Explanation:
Answer:
a
t = 1.235 s
b
c
Explanation:
From the question we are told that
The initial velocity is
The take of height is
The negative sign show that the height is on the negative y-axis when the take off point is consider as the origin
Generally from the kinematic equation we have that
=>
Here g is negative given that the swimmers jump motion is against gravity
solving using quadratic formula we obtain that
t = 1.235 s
Generally the highest point is mathematically evaluated as
Here v = 0 m/s since the velocity at the highest point is 0
Generally her velocity when the feet hits the water is mathematically evaluated from kinematic equation as
The negative value of the velocity is selected because the velocity is on the negative y-axis
Answer:
0 degrees
Explanation:
Let are two forces. The resultant of two forces acting on the same point is given by :
Where is the angle between two forces
When i.e. when two forces are parallel to each other,
When i.e. when two forces are parallel to each other,
When i.e. when two forces are parallel to each other,
It is clear that the resultant of two forces acting on the same point simultaneously will be the greatest when the angle between them is 0 degrees. Hence, this is the required solution.
Answer:
the answer is b
Explanation:
gravity pulls you down so on a scale you will weigh more. less gravity you will weigh less.
<h2>
Speed of jet is 730 miles per hour and speed of wind is 160 miles per hour.</h2>
Explanation:
Let the speed of jet be j and speed of wind be w.
Flying against the wind a jet travels 1710 miles in 3 hours
Distance = 1710 miles
Time = 3 hours
We have
Distance = Speed x Time
1710 = Speed x 3
j - w = 570 miles per hour ----------------eqn 1
Flying with the wind the same jet travels 6230 miles in 7 hours
Distance = 6230 miles
Time = 7 hours
We have
Distance = Speed x Time
6230 = Speed x 7
j + w = 890 miles per hour ----------------eqn 2
eqn 1 + eqn 2
2 j = 1460
j = 730 mph
Substituting in eqn 2
730 + w = 890
w = 160 mph
Speed of jet is 730 miles per hour and speed of wind is 160 miles per hour.