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3 years ago

Two skaters stand facing each other. One skater's mass is 60 kg, and the other's

Physics

1 answer:

jeyben [28]3 years ago

3 0

Answer:

v' = 2.4 m/s

Explanation:

Given that,

Mass of one skater, m = 60 kg

Mass of the other's skater, m' = 60 kg

The two skaters push off each other. After the push, the smaller skater has a velocity of 3.0 m/s.

When there is no external force acting on a system, the momentum remains conserved. It means initial momentum is equal to the final momentum. Let v' is the velocity of the larger skater.

mv = m'v'

$v'=\dfrac{mv}{m'}\\\\v'=\dfrac{60\times 3}{75}\\\\v'=2.4\ m/s$

So, the velocity of the larger skater is 2.4 m/s.

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anastassius [24]

Answer:

Option (c)

Explanation:

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3 years ago

A square sheet of rubber has sides that are 20 cm long. What is the area of the square of rubber in cm squared?

Alinara [238K]

Answer:

400cm^2

Explanation:

sides are 20cm long Area for a square is a squared

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3 years ago

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Marianna [84]

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3 years ago

A +12 Î¼C charge and -8 Î¼C charge are 4 cm apart. Find the magnitude and direction of the E-field at the point midway between t

Natasha_Volkova [10]

Answer:

Explanation:

Given

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$k=9\times 10^{9}$

magnetic field due to first charge at mid-way between two charged particles is

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$r=\frac{d}{2}=\frac{4}{2}=2\ cm$

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$E_1=27\times 10^7\ N/C$ (away from it)

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$E_2=\frac{kq_2}{r^2}$

$E_2=-\frac{9\times 10^9\times 8\times 10^{-6}}{(2\times 10^{-2})^2}$

$E_2=-18\times 10^7\ N/C$ (towards it)

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3 years ago

Which parts of the graph would increase if all of earth's polar ice melts? Which part would decrease?

Sedbober [7]

Answer:

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3 years ago