Answer:
,
(Northeast)
Explanation:
Let consider that owner has the resultant direction of the momentums from the dog and the cat. First, the momentum of the owner is:
The speed of the owner is:
Lastly, the direction of the owner is:
(Northeast)
7. The Cuyahoga River in Ohio has caught fire
1 answer:
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The tension in the string B) It quadruples.
Explanation:
The ball is in uniform circular motion in a horizontal circle, so the tension in the string is providing the centripetal force that keeps the ball in circular motion. So we can write:
where:
T is the tension in the string
m is the mass of the ball
v is the speed of the ball
r is the radius of the circle (the lenght of the string)
In this problem, we are told that the speed of the ball is doubled, so
v' = 2v
Substituting into the previous equation, we find the new tension in the string:
Therefore, the tension in the string will quadruple.
Learn more about circular motion:
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