- #1
sheenu32
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1. Mr. B takes his grade 12 physics class to the local amusement park at Hopedale Mall to conduct some experiments on friction and centripetal force in the gravitron. The Gravitron is an amusement park ride shaped like a vertical cylinder with a radius of 7m. Riders stand with tier backs against the inside wall of the cylinder, facing the center. As the cylinder begins to rotate faster and faster, the riders become pinned to the wall. The floor then dissapears and the riders are left suspended against the wall as the ride continues to rotate at top speed.
a) what must be exerting force on the riders to give them the necessary centripetal force directed towards the center of the cylinder? what type of force is this?
b) What must be true about the vertical forces on the riders, given that they are moving in a horizontal circle?
c) what force is holding the riders up against gravity so that they do not fall?
d) Given the coeffience of friction between a typical rider and the wall is aprroximately 0.4, what is the minimum freequency of rotation required so that the riders do not fall? Express yur answer in rpm.
for part d i think we use this equation
Fc= mass*4*radius^2*freequency^2
a) i think the answer for this is the gravity of the Earth that's exerting force. This is Fg force which is equal to Fn
b) they should b equal to each other positive
c) Ff
d) i didnn know how to solve this at all
Plz try to help me i m kinda stuck i get the idea but i donnohow to explain it
a) what must be exerting force on the riders to give them the necessary centripetal force directed towards the center of the cylinder? what type of force is this?
b) What must be true about the vertical forces on the riders, given that they are moving in a horizontal circle?
c) what force is holding the riders up against gravity so that they do not fall?
d) Given the coeffience of friction between a typical rider and the wall is aprroximately 0.4, what is the minimum freequency of rotation required so that the riders do not fall? Express yur answer in rpm.
Homework Equations
for part d i think we use this equation
Fc= mass*4*radius^2*freequency^2
The Attempt at a Solution
a) i think the answer for this is the gravity of the Earth that's exerting force. This is Fg force which is equal to Fn
b) they should b equal to each other positive
c) Ff
d) i didnn know how to solve this at all
Plz try to help me i m kinda stuck i get the idea but i donnohow to explain it