Kinetic Energy, Conservation of Energy, Potential Energy, etc

In summary, a bead slides on a vertical wire with gravity acting in the -y direction. The bead starts at A with an initial velocity v and moves to the right. The wire is frictionless between A and D and between F and G, but there is friction between D and F. The speed at A is less than the speed at C, between C and D the speed neither increases nor decreases, the bead's kinetic energy at D is less than its kinetic energy at F, and the total energy of the bead at A is equal to the total energy at B due to conservation of energy.
  • #1
nicknaq
67
0

Homework Statement


see the diagram two posts below this.
A bead slides on a wire, which is in a vertical plane, as shown in the diagram. Gravity acts in the -y direction. The bead starts at A, moving to the right with an initial velocity v. The wire is frictionless between A and D and between F and G, but there is friction between D and F. (For each statement select True, False, Greater than, Less than, Equal to, or Not enough information to tell.
1. The speed at A is ______ the speed at C
2. True or False: Between C and D, the speed increases, then decreases
3. The bead's kinetic energy at D is _____ its kinetic energy at F
4. The total energy of the bead at A is ______ the total energy at B

Homework Equations

The Attempt at a Solution


1. less than because potential energy is converted into kinetic
2. false because I can't see why it would decrease
3. less than because potential energy is converted to kinetic
4. equal to because energy is conserved and this part is frictionless
 
Last edited:
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  • #2
Would be easier if I could access the diagram.. the link requires an account on that site.
 
  • #3
sorry everyone here's the new diagram
 

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  • #4
one last bump. Please. It's due in a few hours.
 
  • #5
nevermind, got it
:)
 

What is kinetic energy?

Kinetic energy is the energy an object possesses due to its motion. It is calculated as one-half of the mass of the object multiplied by the square of its velocity.

What is the conservation of energy?

The conservation of energy is a fundamental law of physics that states that energy cannot be created or destroyed, only transferred or converted from one form to another.

What is potential energy?

Potential energy is the energy an object possesses due to its position or configuration. It is stored energy that can be converted into kinetic energy when the object moves.

How do you calculate potential energy?

The formula for calculating potential energy is mass x gravity x height. This formula applies to objects in a gravitational field, where the potential energy is due to the object's position above the ground.

What is the relationship between potential energy and kinetic energy?

Potential energy and kinetic energy are two forms of energy that can be interconverted. When potential energy is converted into kinetic energy, the object moves, and vice versa.

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