183_notes:examples:finding_the_range_of_projectile

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For the previous example of the out of control bus which is forced to jump from a location 0,40,5 with an initial velocity of 80,7,5. We have now found the time of flight to be 9.59s and now want to find where the bus returns to the ground?

Facts

Lacking

Approximations & Assumptions

Representations

First find vfy for when it hits the ground. We need this in order to find vavg

Vfv=Viy+(Fnet,ym)Δt

=Viy+(mgm)Δt

=ViygΔt

=7m/s(9.8Nkg)(9.59s)

=87m/s

Now to find the range:

rf=ri+vavgΔt

=ri+vi+vf2Δt

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  • Last modified: 2014/07/20 22:24
  • by pwirving