Air resistance and projectile help

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Homework Help Overview

The discussion revolves around the effects of air resistance on the time of flight of a projectile, specifically comparing the time taken to reach the highest point and the time taken to return to the launch point. The subject area includes concepts of kinematics and dynamics in projectile motion.

Discussion Character

  • Exploratory, Assumption checking, Conceptual clarification

Approaches and Questions Raised

  • Participants explore the relationship between air resistance and velocity, questioning how air resistance impacts the time of ascent and descent of a projectile. There is an attempt to compare velocities at equal heights in the trajectory.

Discussion Status

Participants are actively engaging with the concepts, with some offering insights about the effects of air resistance on velocity and time. There is a mix of assumptions being examined, particularly regarding scenarios with and without air resistance.

Contextual Notes

Assumptions about the absence of air resistance are being discussed, along with the implications of such assumptions on the projectile's motion. There is a mention of a specific equation related to air resistance, indicating a focus on the forces acting on the projectile.

reza
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if we lunch a projectile with the act of air resistance which t (time) is longer
t1 =>from t=0 to arriving to the highest point
t2=> from highest point to the lanch point
 
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You tell me. Choose two points at the same height of the trajectory. Compare their velocities. This should be a great hint.
 
my problem is velocity i don't know how air rsistance affects on velocity?
 
Air resistance slows things down. That should be enough information
 
If there is no air resistance(assumption), then?
 
Consider the forces when a particle is thrown upwards.
And the forces then it is going downeards.
Straightforward answer!
 
In case you didn't know... Fair = -kv, where k is some constant. This means that the faster the ball is going, more air resistance is acting.
 
then t1=t2? right?
 

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