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Dennis_Churaev [7]
3 years ago
10

ALWAYS use significant figure rules. Remember that these rules apply to all numbers that are measurements. In working this probl

em, assume the value of "g" to be 9.8 m/s2 with two (2) significant digits unless otherwise stated.
Calculate the total energy of 2.0 kg object moving horizontally at 10 m/s 50 meters above the surface.

a.10. J
b.100 J
c.200 J
d.1080 J
Physics
2 answers:
Anni [7]3 years ago
8 0

Answer:

i think it is b sorry if im worng

iris [78.8K]3 years ago
8 0

Answer : The correct option is, (d) 1080 J

Explanation :

Total energy = Kinetic energy + Potential energy

\text{Total energy}=\frac{1}{2}mv^2+mgh

where,

m = mass of an object = 2.0 kg

v = speed of an object = 10 m/s

h = height of an object = 50 m

g = acceleration due to gravity = 9.8m/s^2

Now put all the given values in the above expression, we get:

\text{Total energy}=\frac{1}{2}\times (2.0kg)\times (10m/s)^2+(2.0kg)\times (9.8m/s^2)\times (50m)

Total energy = 1080 J

Thus, the total energy will be, 1080 J

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Reflected

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One of the brightest nebulae in the night sky, the Orion Nebula may be seen with the unaided eye. The Trapezium is a young open cluster of four main stars in this magnitude 4 interstellar cloud of ionized atomic hydrogen.

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3 0
1 year ago
The average speed between earth and the sun is 1.50 x10^8 km. Calculate the average speed of the Earth in its orbit in kilometer
cluponka [151]

Answer:

The average speed of the earth in its orbit is 29.86km/s

Explanation:

The average distance between the Earth and the Sun is 1.50x10^{8} km.

The average speed of the earth in its orbit can be found by the next equation :

v = \frac{2 \pi r}{T}  (1)

Where r is the radius and T is the period.

In this case, the orbit of the Earth can be considered as a circle

(r = 1.50x10^{8}km) instead of an ellipse.

It takes 1 year to the Earth to make one revolution around the Sun. Therefore, its period will be 365.25 days.

Notice that to express the period in terms of seconds, the following is needed:

365.25d . \frac{86400s}{1d} ⇒ 31557600s

Then, equation 1 can be used:

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7 0
3 years ago
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Ber [7]

Answer:

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In our solar system, we have several planet. Pluto is one of the. Pluto is a planet that is highly oval shaped orbit and eccentric that brings it inside the another orbit. It get inside the orbit of Neptune. Sometimes even Neptune get far away from sun in comparison to the dwarf planet Pluto.

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7 0
3 years ago
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