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
anzhelika [568]
3 years ago
12

A roller coaster starts from rest at its highest point and then descends on its (frictionless) track. its speed is 40 m/s when i

t reaches ground level. part a what was its speed when its height was half that of its starting point? what was its speed when its height was half that of its starting point? 33 m/s 14 m/s 20 m/s 28 m/s
Physics
1 answer:
Alenkinab [10]3 years ago
5 0

Given that,

Initial velocity , Vi = 0

Final velocity , Vf = 40 m/s

Acceleration due to gravity , a = 9.81 m/s²

Distance can be calculated as,

2as = Vf² - Vi²

2 * 9.81 *s = 40² - 0²

s = 81.55 m

For half height, that is, s = 40.77m

Vf= ??

2as = Vf² - Vi²

2 * 9.81 * 40.77 = Vf² - 0²

Vf² = 800

Vf = 28.28 m/s

Therefore, speed of roller coaster when height is half of its starting point will be 28 m/s.  

You might be interested in
What question did use of a telescope by hubble answer A) Is earth the center of the universe B) Is the sun the center of the uni
cestrela7 [59]

Answer: C

Explanation:

3 0
3 years ago
Read 2 more answers
What is the name of the process in which oceanic crust moves apart at mid-ocean ridges due to convention currents in the mantle?
Katena32 [7]
The answer is D seafloor spreading
7 0
2 years ago
Plans used for work that has to do with construction in or around earth are called
attashe74 [19]
Plans used for work that has to do with construction in or around Earth are called, “Civil Plans.”

Hope this helped!

7 0
3 years ago
2. What kinds of statistics are used in sports? In a paragraph explain your answer with examples
Lostsunrise [7]

Answer: Sports Illustrated noted that analytics in a sport such as a football is widely used to manage injury prevention. Basketball coaches make use of statistics such as field-goal attempts, effective field goal percentage, free throw attempts, and free throw percentages.

Explanation: BRAINLEST?

4 0
2 years ago
As a pendulum swings from its highest to lowest position, what happens to its kinetic and potential energy?
DIA [1.3K]

The potential energy decreases while the kinetic energy increases.



7 0
3 years ago
Read 2 more answers
Other questions:
  • A hydraulic lift is made by sealing an ideal fluid inside a container with an input piston of cross-sectional area 0.004 m2 , an
    7·1 answer
  • When the switch is closed, what happens to the current in the circuit? (The intrinsic resistance of the inductor is zero.)
    13·1 answer
  • Match the following
    11·1 answer
  • What is the genotype for a woman with no freckles?
    7·2 answers
  • A hand pump is being used to inflate a bicycle tire that has a gauge pressure of 41.0 lb/in2. If the pump is a cylinder of lengt
    5·1 answer
  • An electron moves in a circular path perpendicular to a magnetic field of magnitude 0.275 T. If the kinetic energy of the electr
    9·2 answers
  • Help me! Btw he’s playing golf.
    13·1 answer
  • Solids, liquids, and gases are very often depicted as groups of particles inside containers of fixed shape and dimension.
    7·1 answer
  • I need help with this please thank you!
    12·1 answer
  • Objects 1 and 2 attract each other with a electrostatic force of 72.0 units. if the charge of object 1 is halved, then the elect
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!