Forces and kinetic energy problem

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SUMMARY

The discussion centers on calculating Shawn's kinetic energy while riding his bike, with a total mass of 43.5 kg and a distance of 1.3 km traveled in 10.4 minutes. The average velocity was determined to be approximately 2.08333 m/s after converting units. The kinetic energy formula, KE = 1/2mv², was identified as the method to solve the problem, leading to a final answer of 94.4014 J. Resources for further understanding of kinetic energy were also provided.

PREREQUISITES
  • Understanding of basic physics concepts, specifically kinetic energy.
  • Familiarity with unit conversions (km to m, min to s).
  • Knowledge of the formula for average velocity (avgV = x/t).
  • Basic algebra skills for manipulating equations.
NEXT STEPS
  • Study the derivation and applications of the kinetic energy formula, KE = 1/2mv².
  • Learn about the relationship between mass, velocity, and kinetic energy in different contexts.
  • Explore the concept of energy conservation in physics.
  • Investigate real-world applications of kinetic energy in sports and transportation.
USEFUL FOR

This discussion is beneficial for students studying physics, particularly those tackling problems related to forces and energy, as well as educators looking for teaching resources on kinetic energy.

kza62
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1. Homework Statement
Shawn and his bike have a total mass of 43.5 kg. Shawn rides his bike 1.3 km in 10.4 min at a constant velocity.
The acceleration of gravity is 9.8 m/s^2
What is Shawn's kinetic energy?


2. Homework Equations
F = ma
Ff = u * Fn
Fn = mg
avgV = x/t
x = 1/2(Vf + Vi)t


3. The Attempt at a Solution

ok so I converted km to m and min to s:
x = 1300m
t = 624s
and then i used avgV = x/t so avgV = ~2.08333 m/s

i have no idea what kinetic energy is, this hasn't been covered in class yet but I wanted to get ahead because I think I am coming down with the flu. The answer to the problem is supposed to be 94.4014 J but I have no idea how to set this problem up to get this. Please help me! Thanks.
 
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oooo ok so KE = 1/2mv^2
alright now i can finish this
thanks!
 

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