A 1-lb collar is attached to a spring and slides without friction along a circular rod in a vertical plane. The spring has an undeformed length of 5 in. and a constant k =25 lb/ft. Knowing that the collar is released from being held at A determine, the speed of the collar and the normal force between the collar and the rod as the collar passes through B.

0.4167 ft/s

Explanation:

The law of conservation is applied to point A and B.

This gives:

Hence, is the kinetic energy at the position A

is the velocity at point A

Considering point A, the kinetic energy at the point will be:

The potential energy will be:

Hence, is the potential energy and is the kinetic energy

The potential energy is given by the following:

substituting 1 lb for mg gives 0.4167 ft for r

Then the velocity,

more information

explanation:

answer:

d. attempt to find the owner, then leave your information if you cannot find them.

explanation:

d. represents both (b) and (c).

more logical as well.

b and c are to complicated.

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