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
asambeis [7]
3 years ago
13

What is the maximum speed when the conditions are mass =450 kg, initial height= 30 m, and the roller coaster is initially at res

t?
A. 30 m/s
B. 24.2 m/s
C. 93.9 m/s
D. 132, 300 m/s
Physics
1 answer:
Zarrin [17]3 years ago
3 0

Answer:

B. 24.2 m/s

Explanation:

Given;

mass of the roller coaster, m = 450 kg

height of the roller coaster, h = 30 m

The maximum potential energy of the roller coaster  due to its height is given by;

P.E_{max} = mgh\\\\PE_{max} = 450 *9.8*30\\\\PE_{max} = 132,300 \ J

P.E_{max} = K.E_{max} \ (law \ of \ conservation\ of \ energy)

K.E_{max} = \frac{1}{2}mv_{max}^2\\\\ v_{max}^2 = \frac{2K.E_{max}}{m}\\\\ v_{max}^2 = \frac{2*132300}{450}\\\\ v_{max}^2 =588\\\\v_{max} = \sqrt{588}\\\\  v_{max} = 24.2 \ m/s

Therefore, the maximum speed of the roller coaster is 24.2 m/s.

You might be interested in
Laissez-faire situations are characterized by a high degree of government involvement (t or <br> f.
Vesna [10]
The answer to this is false, I hope that helped
7 0
3 years ago
Read 2 more answers
An air gun fires 2 gram pellets at 60 m/s at a 45 gram golfball initially at rest. The pellets rebound at a speed 40 m/s and are
snow_lady [41]

Answer:

0.16 kgm/s

Explanation:

m_1 = Mass of pellet = 2 g

m_2 = Mass of golf ball = 45 g

u_1 = Initial Velocity of pellet  = 60 m/s

u_2 = Initial Velocity of golf ball = 0 m/s

v_1 = Final Velocity of pellet = 40 m/s

v_2 = Final Velocity of golf ball

In this system the linear momentum is conserved

m_1u_1+m_2u_2=m_1v_1+m_2v_2\\\Rightarrow m_2v_2=m_1u_1+m_2u_2-m_1v_1\\\Rightarrow m_2v_2=0.002\times 60+0-0.002\times 40\\\Rightarrow m_2v_2=0.04

As the golf ball is being shot 4 times every second the momentum delivered to the golf ball each second is 4\times 0.04=0.16\ kgm/s

8 0
3 years ago
Where might Michael look to find ideas about what the teacher thinks is important information to be learned for a test? a.Vocabu
masya89 [10]
D. B and C only
My sister just took the test and im sitting next to her and D is the correct answer

8 0
3 years ago
Read 2 more answers
As an object is undergoing free fall motion.As it falls the objects?,speed increases,acceleration increases,both of these,or non
Alex_Xolod [135]
The speed will increase, as there is acceleration, while the acceleration will remain constant, as gravity is constant.
4 0
3 years ago
How is the levitation of the SCMagLev train achieved? Just write a sentence.
Harman [31]

Answer:

<h2>The SCMaglev (superconducting maglev, formerly called the MLU) is a magnetic levitation (maglev) railway system developed by Central Japan Railway Company (JR Central) and the Railway Technical Research Institute</h2>

5 0
2 years ago
Read 2 more answers
Other questions:
  • 50 The emissivity of galvanized steel sheet, a common roofing material, is s = 0.13 at temperatures around 300 K, while its abso
    14·1 answer
  • A bicycle takes 8 seconds to accelerate at a constant rate from rest to a speed of 4 m/s. If the mass of the bicycle and rider t
    9·1 answer
  • A boy and a girl are riding a merry- go-round which is turning ata constant rate. The boy is near the outer edge, while a girl i
    10·1 answer
  • Two balls of equal mass at the bottom of an incline are rolled upward without slipping at the same initial velocity. one ball is
    10·1 answer
  • Kamala puts on inline skates and stands facing a wall. When she pushes against the wall, she rolls backward. Why does pushing ha
    5·2 answers
  • Which of the following would be an example of an uncontrolled experiment? The effect of salt and water being mixed at different
    10·1 answer
  • The pressure of a monatomic ideal gas is doubled, while the volume is cut in half. By what factor is the internal energy of the
    6·1 answer
  • Rocket can propel itself in a vacuum. True or false
    11·1 answer
  • How would the photographer use the polarizing filter to find out the direction of polarization of the light coming from the blue
    5·1 answer
  • A meteor is falling towards the earth. The mass and the radius of the earth is 6×10^24 kg and 6.4×10^3 km respectively. What is
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!