Homework Help: Physics

Posted by Jenn on Wednesday, October 21, 2009 at 8:53pm.

Rollercoaster has a dip that bottoms out in a vertical circle of radius r.

Passenger feels seat of car pushing upward on her with a force twice her weight as she goes through the dip.

If r = 20.0 m, how fast is rollercoaster going at bottom of the dip?

Physics - Vipster, Wednesday, October 21, 2009 at 8:59pm
Potential energy at the topmost point = mg(2r)

Kinetic energy at dip bottommost point= 1/2 m (v^2)

so conservation of energy means

mg 2r = 1/2 m(v^2)

or 4rg= v^2
or v = 2sqrt(rg)

Answer this Question

Related Questions

physics - A roller coaster at an amusement park has a dip that bottoms out in a ...
college physics - A roller coaster at an amusement park has a dip that bottoms ...
Physics - A roller coaster at an amusement park has a dip that bottoms out in a ...
physics - A roller coaster at an amusement park has a dip that bottoms out in a ...
physics - An inquisitive physics student, wishing to combine pleasure with ...
Physics - The passengers in a roller coaster car feel 50% heavier than their ...
Physics Distance and Displacement Question? - A passenger in the rear seat of a...
physics - A fighter pilot dives his plane toward the ground at 485 m/s. He pulls...
Physics - A fighter pilot dives his plane toward the ground at 345 m/s. He pulls...
Physics - A 60kg front seat passenger in a car moving initially with a speed of ...

For Further Reading

First Name:
School Subject:
Answer: