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Q2: Energy ***(PLEASE DRAW MOTION DIAGRAM AND SKETCH SEPARATE) - (KNOWNS AND UNKNOWNS).*** Problem Statement A...

Q2: Energy

***(PLEASE DRAW MOTION DIAGRAM AND SKETCH SEPARATE) - (KNOWNS AND UNKNOWNS).***

Problem Statement

A constant external force of 160 N is applied to a 20.0 kg box at a angle of 30 degrees from the horizontal. The box is on a rough horizontal surface. While the force pushes the box a distance of 8.00 m, the speed changes from 0.500 m/s to 2.50 m/s. What is the work done by friction on the box?

Visual Representation

  • Draw a sketch of the system showing the before and after state

  • Establish a coordinate system and define symbols

  • Determine if external forces do work on the system

  • Determine if the system’s energy is conserved

  • List knowns and desired unknowns

Mathematical Representation

  • Start with an expression for work-energy principle or
    the conservation of energy using the symbols defined in your sketch

  • Substitute in the known values, including units

  • Solve equation(s) for the desired unknown

  • Check units and assess if your answer is reasonable

Solutions

Expert Solution

genius_generous answered 2 years ago
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