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
svlad2 [7]
2 years ago
10

An 80,000 kg plane is flying at 900 km/h at a height of 10 kilometers. What is its total mechanical energy? Group of answer choi

ces 478 MJ 250 MJ 10,340 MJ 773 MJ
Physics
1 answer:
Romashka-Z-Leto [24]2 years ago
4 0

The mechanical energy of the given flying object is 10,340 MJ. So the correct choice is 10,340 MJ.

Mechanical energy: The mechanical energy of an object is the sum of its potential energy and kinetic energy.

The formula for the mechanical energy E is:

E=K+U

where K is the kinetic energy and U is the potential energy.

Kinetic energy: The energy possessed by an object due to the motion.

The kinetic energy is given by the formula,

K=(1/2)*(mv^2)

where m is the mass of the object and v is the velocity of the object.

Potential energy: The energy possessed by an object due to its relative position from a given point.

The potential energy is given by the formula,

U=m*g*h

where g is the acceleration due to gravity and h is the height of the object from the ground.

Substitute K=(1/2)*(mv^2) and U=m*g*h in the formula of the mechanical energy to get the following formula,

E=(1/2)*(mv^2)+m*g*h

Given that m=80000 kg, h=10 km, and v=900 km/h, and the value of g is 9.8 m/s^(-2), the value of the total mechanical energy is,

E=(1/2)*(80,000 kg)(900 km/h )^2+(80,000 kg)*(9.8 m/s^(-2))*(10 km)

Note: 1 km= 1000 m and 1 km/h = 5/18 m/s. 1 MJ = 10^(6) J

E=(1/2)*(80,000 kg)*(900*(5/18) m/s )^2+(80000 kg)*(9.8 m/s^(-2))*(10000 m)

E=(1/2)*(80,000 kg)*(250 m/s)^2+7840*10^(6) J

E=2500*10^(6) J+7840*10^(6) J

E=10340*10^(6) J

E=10340 MJ

Learn more about Potential energy here:

brainly.com/question/15647581

#SPJ4

You might be interested in
Which word in the sentence is a helping verb Jamie could probably repair his bike by himself
Vesna [10]
Helping verbs come before the main verb, the main verb in the sentence is repair therefor the helping verb would be could.
6 0
3 years ago
Help ASAP<br> Answer question 3 please!!!
PolarNik [594]

Answer:

the answer is ture

Explanation:

because the energy substances must absorb in order to change from liquid to gas

8 0
3 years ago
Given that on Earth, gravity causes an acceleration of 9.8 m/s2, what is an acceleration of 7 g?
zzz [600]

Answer:

68.6 m/s^2

Explanation:

1 g = 9.8 m/s^2

so

7 g × 9.8m/s^2 = 68.6

7 0
3 years ago
Which system helps regulate fluids in the body?
Harman [31]
The answer is A. Urinary system
4 0
3 years ago
Read 2 more answers
I need helpppppp asap
asambeis [7]
It’s c because it’s not Control so that means that it would be broken and non fix able
5 0
3 years ago
Other questions:
  • A long, thin straight wire with linear charge density λ runs down the center of a thin, hollow metal cylinder of radius R. The c
    12·1 answer
  • What is it asking MathPhys im sorry i dont know but i tried teaching myself physics but i cant
    10·1 answer
  • A car is safely negotiating an unbanked circular turn at a speed of 25 m/s. The road is dry, and the maximum static frictional f
    7·1 answer
  • You drop a rock from rest out of a window on the top floor of a building, 25.0 m above the ground. When the rock has fallen 4.90
    12·1 answer
  • You walk with a velocity of 2 m/s north. You see a man approaching you, and from your frame of reference he has a speed of 3 m/s
    11·1 answer
  • A figure shows a vertically moving block on the end of a cord. The graph next to the figure gives the vertical velocity componen
    13·1 answer
  • When you are paddling a canoe, you push the water backwards with your paddle, witch in turn will push you forward. Witch law of
    5·1 answer
  • a two eyed minion homozygous is married to a one eyed minion. They have 8 children. How many of those children will have two eye
    7·1 answer
  • Explain, in complete sentences, Issac Newton's Laws Of Motion. Explain how each law is applied in the real world​
    7·2 answers
  • A power source of 6.0 V is attached to the ends of a<br> capacitor. The charge is 12 C.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!