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Maurinko [17]
3 years ago
8

A 10 kg ball has a momentum of 40 kg.m/s.what is the ball's speed?

Physics
1 answer:
iren [92.7K]3 years ago
7 0
M = 10kg
P = 40 kg.m/s
V= 4m/s

Formula v = p/m

V= p/m
=4okg.m/s / 10kg
=4m/s
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. While a person lifts a book of mass 2 kg from the floor to a tabletop, 1.5 m above the floor, how much work does the the perso
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Answer:

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b) - 29.4 J

Explanation:

Given:

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Height above the floor, h = 1.5 m

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now,

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Thus,

work done by the gravity will be negative

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or

work done by the gravity = - 29.4 J

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2 years ago
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A cardinal (Richmondena cardinalis) of mass 3.70×10−2 kg and a baseball of mass 0.144 kg have the same kinetic energy. What is t
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Answer:

\frac{p_{c}}{p_{b}}\approx 0.507

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Since the cardinal and ball have the same kinetic energy, it is possible to determine the ratio between speeds. (c for cardinal, b for baseball)

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The ratio is obtained by multiplying each side by \frac{m_{c}}{m_{b}}:

\frac{p_{c}}{p_{b}}=\frac{m_{c}}{m_{b}}\cdot \sqrt{\frac{m_{b}}{m_{c}} }

\frac{p_{c}}{p_{b}}= \sqrt{\frac{m_{c}}{m_{b}} }

The value of this ratio is:

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3 years ago
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Answer:

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