A football player kicks a field goal from a distance of 45 m from the goalpost. The football is launched at a 35° angle above th
2 answers:
The initial velocity is required so that the football just clears the goalpost crossbar that is 3.1 m above the ground is 13.7 m/s.
<h3>Projectile</h3>Projectile is the curved motion experienced by an object which is thrown in space.
Given an angle (θ) = 35°, acceleration due to gravity (g) = 10 m/s². u is initial velocity
The maximum height (h) is:
For the ball to reach 3.1 m above the ground:
The initial velocity is required so that the football just clears the goalpost crossbar that is 3.1 m above the ground is 13.7 m/s.
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Answer:
The strength of the magnetic field that the line produces is .
Explanation:
From Biot-Savart law, the equation to determine the strength of the magnetic field for any straight wire can be deduced:
(1)
Where is the permiability constant, I is the current and r is the distance from the wire.
Notice that it is necessary to express the current, I, from kiloampere to ampere.
⇒
Finally, equation 1 can be used:
Hence, the strength of the magnetic field that the line produces is .