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3 years ago

A 3-kilogram ball is accelerated from rest to a speed of 10 m/sec. What is the ball's change in momentum?

Physics

2 answers:

kupik [55]3 years ago

8 0

Answer

The change in momentum of ball is 30kg m/sec .

Explanation:

Formula for change in momentum is given by .

$\Delta P = mv -mu$

Where m is mass , v is final velocity and u is initial velocity .

As given

A 3-kilogram ball is accelerated from rest to a speed of 10 m/sec.

m = 3

u = 0 m/sec

v = 10 m/sec

Putting values in the formula

$\Delta P = 3\times 10 -3\times 0$

$\Delta P = 30\ kg\ m/sec$

Therefore the change in momentum of ball is 30kg m/sec .

valentina_108 [34]3 years ago

4 0

Change in Momentum = mv - mu.

u = 0, v = 10 m/s. Note ball accelerated from rest, so initial velocity = 0. u =0

Change in Momentum = mv - mu = 3*10 - 3*0 =30.

Change in Momentum = 30 kgm/s.

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A balloon is 3m in diameter and is filled with 5 kg of N2. Find the specific volume of the gas in the balloon. Express it in bo

enyata [817]

Answer:

The the specific volume and weight are 79.16m³/k mol and 49 N.

Explanation:

Given that,

Diameter = 3 m

Mass of N₂ = 5 kg

We need to calculate the volume of balloon

Using formula of volume

$V= \dfrac{4}{3}\pi r^3$

$V= \dfrac{4}{3}\pi \times{\dfrac{d}{2}}^3$

$V= \dfrac{4}{3}\pi \times(\dfrac{3}{2})^3$

$V=14.137\ m^3$

We need to calculate the specific volume in the balloon

$Specific\ volume=\dfrac{Volume}{mass}$

$Specific\ volume=\dfrac{14.137}{5}$

$Specific\ volume=2.8274\ m^3/kg$

Now, Molar mass of N₂ gas is 0.028 kg/mol

Now, Specific volume of N₂ gas in the balloon is

$Specific\ volume =0.028\times2.8274=0.0791672\ m^3/mol$

$Specific\ volume =79.16m^3/kmol$

(b). We need to calculate the weight of the gas in the balloon

Weight of the balloon is dependent on the mass of the gas.

The weight of the gas is given by

$W = mg$

$W = 5\times9.8$

$W = 49\ N$

Hence, The the specific volume and weight are 79.16m³/k mol and 49 N.

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4 years ago

Q.A person sitting in a moving train throws a ball

exis [7]

Answer:

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Explanation:

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Hope this helps.

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3 years ago

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gulaghasi [49]

Explanation:

Hi Linda,

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3 years ago

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mr_godi [17]

Answer:

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Explanation:

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