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3 years ago

A rock of mass 200kg is dropped from a height of 200m. What is the Kinetic energy at:

Physics

2 answers:

const2013 [10]3 years ago

5 0

Da ansa is d ) jus befoo it hits da ground

Oksana_A [137]3 years ago

5 0

Explanation:

M=200kg

H=200m

for 0 second

now

ke=1/2mv^2

=1/2 .200.200/0

=40000/2

=20000 kgm/ s

for 2second

now

ke=1/2mv^2

=1/2.200.200/2

=40000/4

=10000 kgm/s

for 4second

now

ke= 1/2mv^2

=1/2.200.200/4

=40000/8

=5000 kgm/s

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Which planet orbits in a different plane than all of the others?

coldgirl [10]

Although they're all 'close', none of the planets orbits in the same plane as any other planet. They're all in slightly different planes.

The farthest out compared to all the others is Pluto, with an orbit inclined about 17 degrees compared to the ecliptic plane (Earth's orbit). But Pluto is officially not a planet, so I don't think it's a good answer.

The next greatest inclination compared to Earth's orbit is Mercury. That one is about 7 degrees.

The other six planets are all in different orbital planes inclined less than 7 degrees compared to Earth's orbit.

6 0

3 years ago

A vw bug is driving north on a straight two lane road at a constant 54 mph and chevy impala south at 47 on the same road (but di

mario62 [17]

Velocity of vw bug is given as

$v_1 = 54 mpH$ towards north

velocity of imphala is given as

$v_2 = 47 mph$ towards south

now we need to find velocity of imphala relative to bug

$v_{21} = v_2 - v_1$

$v_{21} = 47 - (-54) = 101 mpH$

so the speed is 101 mpH towards south so correct option is C

5 0

3 years ago

Which situation would deplete freshwater?

sasho [114]

Answer:

If freshwater consumption was greater than freshwater renewal.

Explanation:

Similar to another Brainly answer :O

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3 years ago

A man has a mass of 85kg, what is his weight

Ostrovityanka [42]

The answer is he weighs 187.39 LBS/Pounds

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3 years ago

Read 2 more answers

Certain neutron stars (extremely dense stars) are believed to be rotating at about 10 rev/s. If such a star has a radius of 18 k

Aleks [24]

Answer:

mass of the neutron star =3.45185×10^26 Kg

Explanation:

When the neutron star rotates rapidly, a material on its surface to remain in place, the magnitude of the gravitational acceleration on the central material must be equal to magnitude of the centripetal acc. of the rotating star.

That is

$\frac{GM_{ns}}{R^2}= \omega^2 R$

M_ns = mass odf the netron star.

G= gravitational constant = 6.67×10^{-11}

R= radius of the star = 18×10^3 m

ω = 10 rev/sec = 20π rads/sec

therefore,

$M_{ns}= \frac{\omega^2R^3}{G} = \frac{4\pi^2\times(18\times10^3)^3}{6.67\times10^{-11}}$

= 3.45185... E26 Kg

= 3.45185×10^26 Kg

4 0

3 years ago