Register to reply

Rocket projectile motion problem

by Jessicaelleig
Tags: acceleration, distance, kinematics, velocity
Share this thread:
Jessicaelleig
#1
Oct11-08, 06:10 PM
P: 12
Ronson drives a rocket sled from rest m up from a15 degree ramp at an acceleration of 8.0 m/s2. The rocket cuts off at the end of the ramp, which happens to be atthe edge of a 75 m high cliff. He freefalls in his sled until he bounces on a trampoline, which is on a 30.0 m high platform, and gives him an upward acceleration of 108 m/s2 for 0.45 s. Again he freefalls, bouncing this time on the ground, which gives him an upward acceleration of 445 m/s2 for 0.12 s. FInally after a third freefall, he stops bouncing, losing all vertical velocity but none of his horizontal velocity. Now that he's on the ground, he slides horizontally, decelerating at 1.5 m/s2 before coming to a stop. How far is the diagonal distance from the top of the ramp to his final resting place?

THis is really advanced, and I am really bad at projectiles motion. I know it involves x and y components.

It involves kinematic equations
V = Vo + at

X - Xo = Vot + .5at2

v2 = vo2 + 2a(X - Xo)

X - Xo = .5(Vo + V)t

If you can provide ideason how for me to solve this, that would be appreciated!
Phys.Org News Partner Science news on Phys.org
Scientists develop 'electronic nose' for rapid detection of C. diff infection
Why plants in the office make us more productive
Tesla Motors dealing as states play factory poker
Redbelly98
#2
Oct12-08, 08:38 AM
Mentor
Redbelly98's Avatar
P: 12,070
Welcome to PF.

You need to take this one step at a time. Each step is simple, but there are many of them.

Start with the ramp. You didn't say how long it is, but the problem statement must have given another piece of information that is missing from your post.

Or is the ramp 75m high, i.e. the low end of the ramp is even with the bottom of the cliff?
Jessicaelleig
#3
Oct13-08, 04:30 PM
P: 12
can anyone please help?

Jessicaelleig
#4
Oct13-08, 04:34 PM
P: 12
Rocket projectile motion problem

sry
its supposed to be
"Ronson drives a rocket sled from rest 25 m up from a15 degree ramp at an acceleration of 8.0 m/s2."
Redbelly98
#5
Oct13-08, 06:47 PM
Mentor
Redbelly98's Avatar
P: 12,070
Okay, so what is Ronson's velocity when he reaches the end of the ramp?
Jessicaelleig
#6
Oct13-08, 07:10 PM
P: 12
That's what I am trying to figure out with the different x and y components. Do you have any idea how to solve?


Register to reply

Related Discussions
Find speed and acceleration of truck Introductory Physics Homework 8
Need Help with Kinematics Introductory Physics Homework 2
Two photon annihilation in the lab frame General Physics 1
Kinematics (3 in 1) Introductory Physics Homework 2