Answer :
Final answer:
The Work and Energy done by the person on the crate is 710.23 Joules. The final speed of the crate is approximately 15.32 m/s.
Explanation:
The subject of this question is Physics, specifically the topics of Work, Energy, and Motion.
To solve part a, use the Work-Energy theorem: Work = Force x Distance x cos(theta). The theta is the angle between the force and the displacement vectors, here given as 23 degrees. The work done is therefore 156 x 5 x cos(23), which equals 710.23 Joules.
For part b, we'll use the work-energy principle again to find the final kinetic energy: Final kinetic energy = Initial kinetic energy + Work done.
Therefore, the speed of the crate can be calculated using the equation: v = sqrt((2 * Work done) / Mass). As the crate was initially at rest, its initial kinetic energy was zero. Plugging in the values we get, v = sqrt((2 * 710.23) / 12), resulting in the final speed of approximately 15.32 m/s.
Learn more about Work and Energy
brainly.com/question/17290830
#SPJ11
