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
Jobisdone [24]
3 years ago
12

The first hill of a roller coaster is 42.0 meters high. The bottom of the first hill is 4.2 meters off the ground.The roller coa

ster cart has a mass of 4500 kg.
Calculate its potential energy at the top of the first hill.





Calculate its potential energy at the bottom of the first hill.





Challenge- What is the velocity of the cart at the bottom of the first hill?
Physics
1 answer:
Karolina [17]3 years ago
7 0

Answer:

1.89*10⁶J

Explanation:

because 4500kg * 42m*10m/s² is 1890000J

You might be interested in
When a mule stops suddenly, the packages
Flauer [41]
The answer here would be the first law of motion. An object in motion will stay in motion unless acted upon by another force.
5 0
3 years ago
A gymnast is in a tucked position to complete her somersaults. While tucked her moment of inertia about an axis through the cent
torisob [31]

Answer:

\omega_s=12.8886\ rad.s^{-1}

Explanation:

Given that:

  • moment of inertia of tucked body, I_t=16\ kg.m^2
  • rotational speed of the body, N_t=2.5\ rev.s^{-1}
  • i.e. \omega_t=2\pi\times 2.5=15.708\ rad.s^{-1}
  • moment of inertia of  the straightened body, I_s=19.5\ kg.m^2

<u>Now using the law of conservation of angular momentum:</u>

angular momentum of tucked body=angular momentum of straight body

I_t.\omega_t=I_s.\omega_s

16\times 15.708=19.5\times \omega_s

\omega_s=12.8886\ rad.s^{-1}

8 0
3 years ago
There is a vector A with magnitude 5 units pointing toward west, and a
Anit [1.1K]
Using the Pythagorean’s theorem to find the resultant, we find 5’2 +3’2=x’2
X=square root of 34=5.8unitd
4 0
3 years ago
Will knows that the gravitational pull of mars is less than the gravitational pull of earth. When he lands on mars, his mass wil
slamgirl [31]

Answer:

nuni

Explanation:

4 0
3 years ago
The atomic mass of an atom equals the sum of he masses of the ___.
Aleksandr-060686 [28]

The atomic mass of an atom ... in Atomic Mass Units ... is the sum of the numbers of protons and neutrons in its nucleus.

3 0
3 years ago
Other questions:
  • As a ball falls freely toward the ground, its total
    9·1 answer
  • A barge floating in fresh water (rho = 1000 kg/m3) is shaped like a hollow rectangular prism with base area A = 550 m2 and heigh
    11·1 answer
  • e force acting between two charged particles A and B is 5.2 × 10-5 newtons. Charges A and B are 2.4 × 10-2 meters apart. If the
    8·2 answers
  • Compute your average velocity in the following two cases: (A) you walk 73.2m at a speed of 1.22m/s and then run 7302m at a soeed
    6·1 answer
  • (blank) is the thermal energy that flows from one substance to another when the substances differ in temperature
    14·2 answers
  • When light passes straight through an object it is called
    6·1 answer
  • Occurs when an air mass and its clouds encounter a mountain. This forces the air mass to move from a low elevation to a high ele
    10·1 answer
  • Time running out plzz hurry!!!!!!
    12·2 answers
  • If ball A rolls off a 50 cm high table at the same instant that ball B rolls off a 75 cm high table, which will hit the ground f
    11·1 answer
  • A 10-kg box is being pulled across the table to the right at a constant speed with a force of 50N, directed 30 degrees below the
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!