Kinetic Energy and friction problem

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SUMMARY

The discussion focuses on a physics problem involving a 70 kg base runner sliding into second base at an initial speed of 4.0 m/s, with a coefficient of friction of 0.70. The key calculations involve determining the mechanical energy lost due to friction and the distance slid before coming to a stop. The kinetic energy equation, expressed as 1/2mv², is essential for solving part (a) of the problem, while the frictional force, calculated as 49 N, is crucial for part (b).

PREREQUISITES
  • Kinetic energy equation (1/2mv²)
  • Understanding of friction and coefficients of friction
  • Basic principles of mechanics
  • Force calculations using mass and acceleration
NEXT STEPS
  • Calculate mechanical energy loss due to friction using the kinetic energy formula
  • Determine the distance slid using the work-energy principle
  • Explore the relationship between mass, friction, and deceleration
  • Review examples of similar physics problems involving friction and kinetic energy
USEFUL FOR

Students studying physics, particularly those focusing on mechanics, as well as educators seeking to explain concepts of kinetic energy and friction in practical scenarios.

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Homework Statement


A 70kg base runner begins his slide into second base when he is moving at a speed of 4.0m/s. The co-efficient of friction between his clothes and the Earth is 0.70. He slides so that his speed is zero just before he reaches the base

(a). How much mechanical energy is lost due to friction acting on the runner?

(b) How far does he slide



Homework Equations


I think this has something to with the kinetic energy equation which 1/2mv^2



The Attempt at a Solution


I have no idea how to do this
 
Physics news on Phys.org
You don't think that since they tell you that "The co-efficient of friction between his clothes and the Earth is 0.70." and that his mass is "70kg", the fact that there is 0.7(70)= 49 N force acting on his is at all relevant?
 

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