- What’s the minimum speed for a roller coaster car at the top of the loop if it’s to stay on the track?
- How do you find the normal force of a loop?
- Why do you feel weightless at the top of a loop?
- What is the normal force in circular motion?
- What is a Clothoid loop?
- Is riding a Ferris wheel constant velocity or constant acceleration?
- How many G’s can kill you?
- How many G’s can a human take?
- How do you find the G force of a loop?
- Is there kinetic energy at the top of a loop?
- How fast would a car have to go to do a loop?
- What are 3 examples of centripetal force?
- Why is a Clothoid loop better?
- What is the normal force at the bottom of a loop?
- What is the speed of the roller coaster at the top of the loop?
- How do you find tangential acceleration?
- How many g do astronauts experience?

## What’s the minimum speed for a roller coaster car at the top of the loop if it’s to stay on the track?

1 Expert Answer.

To consider the minimum speed at the top of the track, the normal force should be zero.

Then the only force that contributes to the centripetal force is the weight of the coaster..

## How do you find the normal force of a loop?

Use Newton’s second law to determine the normal force acting upon Noah’s 80-kg body at the top and at the bottom of the loop. Use a, m, and g (9.8 m/s/s) with Fnet = m • a and Fgrav = m • g to find Fnet and Fgrav. Then use a free-body diagram to find Fnorm.

## Why do you feel weightless at the top of a loop?

Feelings of weightlessness and heaviness are associated with the normal force; they have little to do with the force of gravity. … At the top of the loop, the gravity force is directed inward and thus, there is no need for a large normal force in order to sustain the circular motion.

## What is the normal force in circular motion?

At the minimum speed that will prevent the object from falling, the normal force is 0 and the gravitation is the centripetal force. If the speed is larger, then the normal force will be positive and will combine with gravitation to result in the centripetal force.

## What is a Clothoid loop?

A clothoid loop is a loop that has a smaller radius of curvature at the top of the loop and a larger radius of curvature at the bottom of the loop. The purpose of this design feature is to allow a cart to travel with a lower velocity at the top of the loop and still complete the loop.

## Is riding a Ferris wheel constant velocity or constant acceleration?

Most of the large observation Ferris wheels move at a speed of 1.5 mph or slower. At this speed the carts can be loaded and exited without the wheel ever stopping, riders enjoying a continuous, constant speed.

## How many G’s can kill you?

According to a recent article in Popular Science, 14 Gs of lateral acceleration can tear your organs loose from one another. Head-to-foot motion, meanwhile, plunges all the blood to the feet. Between 4 and 8 longitudinal Gs will knock you out.

## How many G’s can a human take?

9 g’sNormal humans can withstand no more than 9 g’s, and even that for only a few seconds. When undergoing an acceleration of 9 g’s, your body feels nine times heavier than usual, blood rushes to the feet, and the heart can’t pump hard enough to bring this heavier blood to the brain.

## How do you find the G force of a loop?

To calculate the g’s felt remember that the g’s felt by the rider is the normal force on the seat of the rider divided by the mass then converted into g’s. As a rider enters a loop he will feel 2 forces. The real number of interest is the number if g’s felt by the passenger traveling in the vertical circle.

## Is there kinetic energy at the top of a loop?

As the ball continues around the loop, its kinetic energy decreases while its potential energy increases. At the top of the loop, if the ball has sufficient kinetic energy, it can continue around the loop without leaving the track.

## How fast would a car have to go to do a loop?

A little under 25 miles an hour, at least. You need the centripetal force required (mass times the square of speed divided by radius) to be equal to or greater than gravitational force (mass times the acceleration due to gravity (g)). The speed requires varies with the square root of the radius.

## What are 3 examples of centripetal force?

Just a few examples are the tension in the rope on a tether ball, the force of Earth’s gravity on the Moon, friction between roller skates and a rink floor, a banked roadway’s force on a car, and forces on the tube of a spinning centrifuge. Any net force causing uniform circular motion is called a centripetal force.

## Why is a Clothoid loop better?

Roller coasters today employ clothoid loops rather than the circular loops of earlier roller coasters. The greater entry speeds subject passengers to greater centripetal acceleration through the lower half of the loop, therefore greater G’s. …

## What is the normal force at the bottom of a loop?

What changes is the normal force of the track pushing on the ball as it moves through the loop. Normal force will be greatest at the bottom of the loop, smallest at the top, and somewhere in between those two values based on the angle of the centrifugal force + gravitational force to the surface.

## What is the speed of the roller coaster at the top of the loop?

So we’re told that at the very top of the roller coaster loop, the radius of curvature is 15 meters and the acceleration is 1.5 times *g* and *g* is 9.8 meters per second squared. So we have 14.8 meters per second must be the speed at the top of the loop.

## How do you find tangential acceleration?

Linear or tangential acceleration refers to changes in the magnitude of velocity but not its direction, given as at=ΔvΔt a t = Δ v Δ t . at=Δ(rω)Δt a t = Δ ( r ω ) Δ t . The radius r is constant for circular motion, and so Δ(rω)=rΔω Δ ( r ω ) = r Δ ω .

## How many g do astronauts experience?

3gsAstronauts normally experience a maximum g-force of around 3gs during a rocket launch. This is equivalent to three times the force of gravity humans are normally exposed to when on Earth but is survivable for the passengers. Astronauts are trained in high g-force, wear g-suits and must be correctly prepared.