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sleet_krkn [62]
3 years ago
7

An astronaut has a momentum of 280 kg and travels 10 m/s. what is the mass of the astronaut?

Physics
1 answer:
Kamila [148]3 years ago
3 0

Answer:

The answer is

<h2>28 kg</h2>

Explanation:

The mass of an object given it's momentum and velocity / speed can be found by using the formula

m =  \frac{p}{v}  \\

where

m is the mass

p is the momentum

v is the speed or velocity

From the question

p = 280 kg/ms

v = 10 m/s

The mass of the object is

m =  \frac{280}{10}  = 28 \\

We have the final answer as

<h3>28 kg</h3>

Hope this helps you

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Answer:

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Explanation:

Work energy theorem states that the total work on a body is equal its change in kinetic energy, this is:

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K=\frac{mv^2}{2} (2)

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Using (2) on (1):

W=\frac{mv_f^2}{2}-\frac{mv_i^2}{2} (3)

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W=Fd=wd=mgd (4)

Using (4) on (3):

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That's the equation we're going to use on a) and b).

a) Because the branch started form rest initial velocity (vi) is equal zero, using this and solving (5) for final velocity:

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b) In this case the final velocity of the boulder is instantly zero when it reaches its maximum height, another important thing to note is that in this case work is negative because weight is opposing boulder movement, so we should use -mgd:

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