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seropon [69]
2 years ago
11

A small ball with a mass of 0.6 kg and a velocity of 12 m/s hits another ball with the same mass. The firs forward and hits a th

ird ball with a mass of 0.2 kg. If the system is closed, what is the velocity of the third ball?
4 m/s

36 m/s

30 m/s

1.44 m/s​
Physics
1 answer:
Ket [755]2 years ago
8 0
I think is 30m/s I am not sure
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A roller-coaster car has a mass of 1240 kg when fully loaded with passengers. As the car passes over the top of a circular hill
LiRa [457]

Answer:

a)      N = 7.90 10³ N,  b) N = -1.04 10⁴ N

Explanation:

a) For this exercise we can use Newton's second law

             N -W = m (-a)

The relationship is centripetal, the negative sign of the acceleration is because it points towards the center of the circle

              a = v² / r

we substitute

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             N = m (g - v² /r)

let's calculate

v = 8.7 m / s

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             N = 7.90 10³ N

b) v = 20 m / s

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             N = -1.04 10⁴ N

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The integumentary system is an organ system consisting of the skin, hair, nails, exocrine glands, and sensory nerves. What is th
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3 years ago
four objects are situated along the y axis as follows: a 2.00kg object is at +3.00m. a 3.00kg object is at +2.50m, a 2.50kg obje
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Answer: 1,348 meters

Explanation: Although the sign is missing from the location of the 4.00 kg object, it is assumed to be positive. The net moment of all the objects about the center of mass must be zero. Let the center of mass be on the y axis at a point  c . Adding the four moments together, we get:

(2.00)(3.00−c)+(3.00)(2.50−c)+(2.50)(0−c)+(4.00)(0.500−c)=0

6.00−2.00c+7.50−3.00c+0−2.50c+2.00−4.00c=0

11.5c=15.50

c=  1.348 metres

The center of mass is on the y axis at  y  = 1.348 metres.

6 0
2 years ago
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