Kinetic Energy rotational motion problem, help please

AI Thread Summary
The discussion centers on a physics problem involving a 2.4 kg cylinder rolling down a ramp. The key questions involve calculating the total kinetic energy, rotational kinetic energy, and translational kinetic energy of the cylinder at the bottom of the ramp. Participants highlight the importance of conservation of energy in solving the problem, indicating that potential energy at the top converts to kinetic energy at the bottom. The equations for linear and rotational kinetic energy are provided, but there is confusion about how to find the speed of the cylinder. The conversation emphasizes the need to identify conserved quantities to solve for the required energies.
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Kinetic Energy rotational motion problem, help please!

Homework Statement



A 2.4 kg cylinder (radius = 0.11 m, length = 0.50 m) is released from rest at the top of a ramp and allowed to roll without slipping. The ramp is 0.62 m high and 5.0 m long.

(a) When the cylinder reaches the bottom of the ramp, what is its total kinetic energy?
(b) What is its rotational kinetic energy?
(c) What is its translational kinetic energy?

Homework Equations



klinear = 1/2mv^2
krotation = 1/2Iw^2

The Attempt at a Solution



tried plugging in 2.4 for mass but have no clue how to get the speed, when its not given.
 
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HINT: Something is conserved.
 


ummm that really doesn't help me..
 


tonedog12345 said:
ummm that really doesn't help me..
Which quantity do you think is conserved?
 

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