1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Nastasia [14]
3 years ago
8

The empire state building is 1,450 feet tall. King Kong weighs 20 tons and he climbs to the very top. If he jumps off the top, w

hat will his velocity be when he reahces the base of the building
Physics
1 answer:
lozanna [386]3 years ago
3 0

Answer:velocity=93.12m/s

Explanation:

We shall use conservation of energy to solve this problem

we have

Potential energy of King Kong at top of building = His kinetic energy at the bottom

Potential energy of an object = m\times g\times h = 20000 kg

Where m is mass of an object(20000 kg)

g is accleration due to gravity = 9.81m/s^{2}

h is the height above the surface of earth = 1450 feet = 441.96 meters

Applying values we get

(P.E)_{TOP}=(20000\times 9.81\times 441.96) Joules\\\\(P.E)_{TOP}= 86712.552KiloJoules......................(i)

Now Kinetic energy is given by

(K.E)_{Bottom}=\frac{1}{2}mv^{2}.......................(ii)

Equating i and ii we get

86712.552 =\frac{1}{2}mv^{2}

v=\sqrt{\frac{2E}{m}}

Applying values we get

v=\sqrt{\frac{2\times 86712.552\times 10^{3}}{20\times 10^{3}}}\\\\v= 93.12m/s

You might be interested in
Does anyone know the answer to all of these questions
Rasek [7]

Answer:

i don't understand the hw

5 0
3 years ago
What is the role of the sun in the formation of clouds??
klasskru [66]
Cloud Formation<span> Due to Surface Heating. Some </span>clouds<span>form due to the heating of the Earth's surface. First, the </span>Sun<span>heats the ground, which then heats the air. ... This extra water vapor begins to condense out of the air parcel in the form of liquid water droplets.</span>
4 0
3 years ago
When you rub a plastic rod with fur, the plastic rod becomes negatively charged and the fur becomes positively charged. As a con
Yuri [45]

Answer: C. the rod gains mass and the fur loses mass.

Explanation:Atomic particles have mass. The electron has a mass that is approximately 1/1836 that of the proton and with exchange exchange of charge this is also factored in. The movement of effect described above is known as the triboelectic charging process—charging by friction—which results in a transfer of electrons between the two objects when they are rubbed together. Plastic having a much greater affinity for electrons than animal fur pulls electrons from the atoms of fur, leaving both objects with an imbalance of charge. The plastic rod would have an excess of electrons and the fur has a shortage of electrons. Having an excess of electrons, the plastic is charged negatively and has more mass. In the same vein, the shortage of electrons on the fur leaves it with a positive charge and consequently with lesser mass.

4 0
3 years ago
Which of the following could be the source of resistance in a household electric circuit?
Tpy6a [65]
D. all of these

all of these use electricity

Hope I helped! 
8 0
3 years ago
Read 2 more answers
A transform boundary occurs where two tectonic plates _____.?
gladu [14]

Where they slide over each other.

Transform boundaries are formed or occur when two plates slide past each other in a sideways motion.  They do not tear or crunch into each other (but the rock in between them may be ground up) and therefore none of the spectacular features are seen such as occur in divergent and convergent boundaries.

In a transform boundary, neither plate is added to at the boundary nor destroyed.  They are marked in some places by features like  stream beds that have been split in half and the two halves moved in opposite directions.



7 0
4 years ago
Read 2 more answers
Other questions:
  • The H line in Calcium is normally at 396.9 nm. However, in a star's spectrum, it is measured at 398.1nm. How fast is the star mo
    14·1 answer
  • Saul converts 2.392 hectoliters to liters. What should his new number be? 0.02392 0.2392 239.2 2392
    13·2 answers
  • Which organism contains organ systems?
    5·1 answer
  • In a bizarre but harmless Superman fell from the top of the Eiffel How fast was Superman traveling when he hit the ground 7.80 s
    9·1 answer
  • A car increases its speed from 20km/hr to 50km/hr in seconds. Its acceleration is _____.
    7·1 answer
  • What is the unit for measuring electric current?<br> A.Volt<br> B.ampere<br> C.ohm<br> D.coulomb
    5·2 answers
  • By what factor is the self-inductance of an air solenoid changed if its length and number of coil turns are both tripled
    14·1 answer
  • Provide one example of how Science drives Technology.
    5·2 answers
  • How much time does it take a rhino running at 40 m/s to run 250 m?​
    10·1 answer
  • How does the mass of the melted sundae compare to when it was first made? this for science
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!