tittle projectiles summative assessment projectile motion and motion in 2d Name: Breonna Bailey Date: NON 1. You're a criminal investigator and need evidence to discover the mystery of a crash. a car traveled the distance of 73m before smashing into the ground it ran off a cliff .the cliff is 32m high from the base to the top . the road was horizontal when the car left the edge of the cliff . what was the initial velocity of the car before it left the edge of the cliff ?

more than, less

less than, more

statement #3 on andre"s list is false.

russian is not my first language, so i'm afraid i can't write out an answer in russian, but hopefully you can find a way to do so. here's my best translation of the problem: you're given a plot of a particle's position in one-dimensional space over time, and you're asked to find either the total distance traveled by the particle after 6 seconds had elapsed, or the total displacement of the particle after 6 seconds.

if you want the total distance traveled, you would first need to determine the particle's velocity as a function of time, then integrate that over the 6-second interval. we know the position function is quadratic with roots at 0 and 6, so we have

where is unknown. because the position is parabolic, there is symmetry about the midpoint at , and we know that

so that the position function is

which means the velocity is

then the total distance traveled is

so the total distance traveled is 20 m.

on the other hand, if you want to find displacement: the particle starts at and ends at , so its displacement is 0.