Ap physics questions on basic kinetics and Newtons second law

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SUMMARY

This discussion focuses on basic kinetics and Newton's second law, specifically addressing two physics problems. The first problem involves a rock dropped from a cliff, where the relationship between the time taken to fall the first and second halves of the distance is analyzed using kinematic equations. The second problem examines a box sliding on a surface, requiring the application of frictional force equations to determine the distance it slides before coming to rest. Key equations referenced include d=vt+(1/2)at^2 and Ff=Fn*mu.

PREREQUISITES
  • Understanding of kinematic equations, specifically d=vt+(1/2)at^2
  • Knowledge of Newton's second law and its application in frictional scenarios
  • Familiarity with free body diagrams and their use in physics problems
  • Basic algebra skills for solving equations
NEXT STEPS
  • Study the derivation and application of kinematic equations in various scenarios
  • Learn about the concepts of friction, including static and kinetic friction coefficients
  • Explore advanced applications of Newton's laws in real-world problems
  • Practice solving physics problems involving free body diagrams and forces
USEFUL FOR

Students studying introductory physics, educators teaching basic mechanics, and anyone interested in understanding the principles of motion and forces in physical systems.

nadinelyab
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1)A rock is dropped off a cliff and falls the first half of the distance into the ground in t1 seconds. If it falls the second half of the distance in t2 seconds, what is the value of t2/t1?

Relevant equations: I think the kinematics equations of d=vt+(1/2)at^2
I have no idea how to solve this please help! I tried to find t1 with the equation above and god t1=sq.rt(d/5) but i don't know if this is right :)

2)a bos of mass m slides on a horizontal surface with initial speed v. I feels no forces other than gravity and the force from the surface. If the coefficient of kinetic friction between the box and the surface is mu how far does the box slide before coming to rest?
Relevant equations: f=ma Ff=Fn*mu,
I basically drew a free body diagram so far
 
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isnt this an introductory physics question
 

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