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Physics homework please help!?
If someone could help me with these questions that would be great!
1. A marble accelerates and travels 32m in 12s what is its acceleration and final velocity?
2. A object is thrown up to a balcony (25m) what velocity does it need to reach it.
also there was one for question but i couldn t remember all the information but it did ask how far an object traveled in 5s what equation would i use to find this info. I THINK it gave the velocity and
2 Answers
- ?Lv 75 years ago
1. A marble accelerates and travels 32m in 12s what is its acceleration and final velocity?
2x = V*t
V = 2x/t = 64/12 = 5.333 m/sec
a = V/t = 16/3/12 = 16/36 = 4/9 of m/sec^2
2. A object is thrown up to a balcony (25m) what velocity does it need to reach it.
Conservation of energy shall apply !!!
V = √2gh = √50*9.8 = 22.14 m/sec
3.
x = V*t at constant speed
x = 1/2a*t^2 at constant acceleration
- Andrew SmithLv 75 years ago
We have answered 1. See https://answers.yahoo.com/question/index?qid=20161...
And I have also answered 2. See https://answers.yahoo.com/question/index?qid=20161...
If you have a time and initial velocity plus acceleration then you use s = ut + 1/2 a t^2
If you have time, initial velocity and final velocity you use s = ( U+v) / 2 * t
If you have starting and ending velocities, the distance moved but NOT the time you use v^2 = u^2 + 2as
