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mr Goodwill [35]
3 years ago
6

The total mass of the train and its passengers is 750000kg. The train is traveling at a speed of 84m/s. The driver applies the b

rakes and the train takes 80s to slow down to a speed of 42m/s.
Physics
1 answer:
fiasKO [112]3 years ago
4 0

Answer:

|F| = 393750  N

Explanation:

Given that,

Total mass of the train, m = 750000 kg

Initial speed, u = 84 m/s

Final speed, v = 42 m/s

Time, t = 80 s

We need to find the net force acting on the train. The formula for force is given by :

F = ma

F=\dfrac{m(v-u)}{t}\\\\F=\dfrac{750000\times (42-84)}{80}\\\\F=-393750\ N

So, the magnitude of net force is 393750  N.

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Molodets [167]

Answer:

0.25 m

Explanation:

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2 years ago
Consider a 100 g object dropped from a height of 1 m. Assuming no air friction (drag), when will the object hit the ground and a
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Answer:

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Explanation:

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As the object is released the initial velocity is zero, let's look at the final velocity with the equation

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Having the final speed we can find the time

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3 0
3 years ago
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Alex777 [14]
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7 0
2 years ago
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2 years ago
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Alex

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ii)

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