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Vesna [10]
3 years ago
7

You are in a train traveling on a horizontal track and notice that a piece of luggage starts to slide directly toward the front

of the train. From this observation, you can conclude that this train is:__________
A) Slowing down
B) Slowing down and changing direction
C) Speeding up and changing direction
D) Speeding up
E) Changing Direction
Physics
1 answer:
Sindrei [870]3 years ago
8 0

A very interesting observation, to be sure.

If the train is traveling forward, then it is slowing down.

If the train is traveling backward, then it is speeding up.

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A loaded 500 kg sled is traveling on smooth horizontal snow at 5 m/s when it suddenly comes to a rough region. The region is 10
sergejj [24]

Answer:

400 N

Explanation:

Change of Kinetic Energy to Friction Wok

∆KE = W

½ x m x (v(5)² - v(3)²) = f x d

½ x 500 x (5² - 3²) = f x 10

250 x (25 - 9) = f x 10

25 x 16 = f

f = 400 N

6 0
3 years ago
Which is the BEST example of the kind of mechanics that are studied in sports biometrics?
ikadub [295]

Answer:

-A.

Explanation:

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[correct me if I'm not correct]

5 0
2 years ago
What does law and theory have common
Ronch [10]

Answer:

It is a misconception that theories turn into laws with enough research.

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7 0
3 years ago
A skateboarder traveling with an initial velocity 9.0 meters per second,
meriva

Answer:

25m/s

Steps:

<em> First, The equation v= u + a * t shows us what we need to find, (the finale velocity). </em>

<em />

Second, we substitute the values given:

v= 9m/s + 4m/s2 * 4s

Last, We calculate the values:

Multiply 4m/s2 * 4s = 16m/s  

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<u></u>

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Hope this helps :)

4 0
3 years ago
A complete circuit contains two parallel connected devices and a generator for providing the electromotive force. The resistance
irga5000 [103]
We are asked to solve and determine the magnitude of the current flowing through the first device. In order for us to have a better understanding of the problem, we can refer to the attached picture which contains electric circuit diagram. Since it the problem we are already given with an electromotive source or the voltage supply and since the two resistance is in parallel, it would clearly mean that the voltage drop in each resistance is just the same. The resistance 1 uses the 40 volts at the same time the resistance 2 uses 40 volts also. Solving further for the current, we can apply Ohm's law which V = IR where "V" represents the voltage, the "I" represents the current and "R" represents the resistance.

Such as the solution in obtaining current is shown below:
I = V / R, substitute values we have it
I = 40 volts / 1208 ohms
I = 0.0331 Amperes

Therefore, the current flowing in the first device is 0.033 Amperes or 33 milliAmperes.

6 0
3 years ago
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