Principle of work and energy to a collar and spring system. Every time I try thi

Question

Principle of work and energy to a collar and spring system.

Every time I try this problem I get 7.04 N. I know theres something simple Im missing but cant figure out what. Any help is much appreciated!

The 3.35kg collar shown below is attached to a spring and released from rest at A. The collar then travels downward a distance of y = 2.00m . The spring has a spring constant of k = 22.5N/m . The distance a is given as 1.15m . The datum for gravitational potential energy is set at the horizontal line through A and B.

Determine the magnitude of the average friction force exerted on the collar when the velocity of the collar at C is 3.52m/s and the spring has an unstretched length of 0.65m .

Express your answer to three significant figures and include the appropriate units.

Principle of work and energy to a collar and spring system. Every time I try this problem I get 7.04 N. I know theres something simple Im missing but cant figure out what. Any help is much appreciated! The 3.35kg collar shown below is attached to a spring and released from rest at A. The collar then travels downward a distance of y = 2.00m . The spring has a spring constant of k = 22.5N/m . The distance a is given as 1.15m . The datum for gravitational potential energy is set at the horizontal line through A and B. Determine the magnitude of the average friction force exerted on the collar when the velocity of the collar at C is 3.52m/s and the spring has an unstretched length of 0.65m . Express your answer to three significant figures and include the appropriate units.

Explanation / Answer

using spring formulas we can get the answer

F=-kx

we can find F

F=ma

we know the velocity

we can fin the required

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