subject
Physics, 11.02.2021 21:00 bdog2213

A roller coaster moving along its track rolls into a circular loop of radius r. In the loop, it is only affected by its initial velocity, gravity, and the shape of the track. Let v denote the instantaneous speed and a denote the magnitude of the instantaneous acceleration of the roller coaster in the loop. Which of the following is true in the loop? a. The roller coaster is not in uniform circular motion, but we still have a=v^2/r everywhere on the loop
b. The roller coaster is not in uniform circular motion, but the tangential acceleration is so small that we can approximate a by v^2/r everywhere on the loop
c. The roller coaster is in uniform circular motion
d. The roller coaster is not in uniform circular motion, and a=v^2/r is only applicable at the very top and bottom of the loop where the tangential acceleration vanishes

ansver
Answers: 2

Another question on Physics

question
Physics, 22.06.2019 09:00
Why can blue light and yellow light combine to produce white light? question 17 options: they are both primary colors of light. they absorb each other's wavelengths. because blue, yellow, and white are primary colors. they are complementary colors of light.
Answers: 1
question
Physics, 22.06.2019 11:30
A100-watt light bulb illuminates a solar cell. the electricity from the solar cell operates a water pump that delivers 1 watt of power. what is the efficiency of the system?
Answers: 2
question
Physics, 22.06.2019 13:40
Which bonds are found inside a water molecule
Answers: 1
question
Physics, 22.06.2019 15:30
What are the similarities & differences between a thermistor and a light dependent resistor in physics?
Answers: 1
You know the right answer?
A roller coaster moving along its track rolls into a circular loop of radius r. In the loop, it is o...
Questions
question
Mathematics, 23.03.2021 17:30
question
Mathematics, 23.03.2021 17:30
question
Mathematics, 23.03.2021 17:30
question
History, 23.03.2021 17:30
question
History, 23.03.2021 17:30