Answer: C) divide: distance ÷ velocity
Explanation:
The velocity equation is distance
divided by time
:
If we isolate we will have:
Hence, the correct option is C: distance divided by velocity.
What force is necessary to accelerate a 2500 kg care from rest to 20 m/s over 10 seconds?
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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