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Burka [1]
2 years ago
14

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

e horizontal. What initial velocity is required so that the football just clears the goalpost crossbar that is 3.1 m above the ground? Ignore air resistance and the dimensions of the football.
Physics
1 answer:
daser333 [38]2 years ago
7 0

Answer:  try searching It up on go0gle

Explanation:

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Answer:

No

Explanation:

The force of tension exerted by the string on the rock acts as centripetal force, so its direction is always towards the centre of the circle.

However, the direction of motion of the rock is always tangential to the circle: this means that the force is always perpendicular to the direction of motion of the rock.

As we know, the work done by a force on an object is

W=Fd cos \theta

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In this situation, F and d are perpendicular, so \theta=90^{\circ}, therefore cos \theta = 0 and the work done is zero:

W=0

4 0
3 years ago
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Papessa [141]
The answer is Carbon. Beyond being the only element listed here that is located in the second row, it is also in the fourteenth column of the table if you count from left to right. Hope this helps!
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3 years ago
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Zielflug [23.3K]
I would assume that the magnesium would have to come into contact with an ion in order to become a magnesium ion. 
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White raven [17]
Your answer is correct. No problem and Have a nice day
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