Total energy= kinetic energy + potential energy

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SUMMARY

The discussion focuses on applying the law of conservation of energy to determine the final speed of an 18 kg box of flower seeds pushed by a gardener with a force of 1.5 x 10^2 N at an angle of 22 degrees below the horizontal. The coefficient of kinetic friction is 0.55, and the box is pushed a distance of 1.6 m. Participants emphasize the importance of calculating the work done on the box and the normal force exerted on the floor, clarifying that potential energy is not a factor in this scenario.

PREREQUISITES
  • Understanding of Newton's laws of motion
  • Familiarity with the concepts of work and energy
  • Knowledge of kinetic friction and its calculation
  • Ability to create and interpret force diagrams
NEXT STEPS
  • Calculate the work done on the box using the formula W = F * d * cos(θ)
  • Determine the normal force acting on the box while being pushed
  • Learn about the effects of friction on motion and energy
  • Explore the relationship between work, energy, and speed in physics
USEFUL FOR

Students studying physics, educators teaching mechanics, and anyone interested in understanding the principles of energy conservation and motion dynamics.

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Homework Statement



A gardener exerts a force of 1.5 x 10^2 N (22 degress below the horizontal) in pushing a large 18 kg box of flower seeds a distance of 1.6 m. The coefficient of kinetic friction between the box and the floor is 0.55.
use the law of conservation of energy to determine the final speed of the box if it starts from rest.

Homework Equations



Total energy= kinetic energy + potential energy

The Attempt at a Solution



But there's no potential energy...:confused:
 
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You should think about how much is work is done on the box and how much is done against the box.
 
You should also compute the normal force the box exerts on the floor given it's being pushed from below. Use a force diagram. Don't worry about the lack of potential energy, there isn't any. Just get started.
 

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