- #1
dragon513
- 26
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Q. A BMX rider is about to ride over a large bump of radius R. What is the maximum speed the rider can travel without leaving the ground?
Choice
A. g/R
B. gR
C. (gR)^0.5
D. It depends on the mass of the rider
The answer provided is C, but howcome g, gravity, is the centripedal acceleration?
I was able to obtain the answer C by using this (V^2)/R = g = centripedal accel (C.A.).
However, shouldn't the direction of the C.A. be perpendicular to the direction the rider is moving to?
g is in fact the C.A. at the top of the large bump, but when the rider is going up or coming down, I don't think g is the C.A.
Am I not correct?
Thank you and Happy New Year!
Choice
A. g/R
B. gR
C. (gR)^0.5
D. It depends on the mass of the rider
The answer provided is C, but howcome g, gravity, is the centripedal acceleration?
I was able to obtain the answer C by using this (V^2)/R = g = centripedal accel (C.A.).
However, shouldn't the direction of the C.A. be perpendicular to the direction the rider is moving to?
g is in fact the C.A. at the top of the large bump, but when the rider is going up or coming down, I don't think g is the C.A.
Am I not correct?
Thank you and Happy New Year!