Smoothie Posted December 9, 2017 Report Share Posted December 9, 2017 Anyone good in physics here? Idk how to solve this the assignement: to qualify in the finals of a racing competition, the racing car must end up in speed at 300km/h on a 400 metre long reach. how big must the car's medium acceleration atleast be? so the problem is I don't know the time. If i had the time I could just use the formula but I guess I need other formula to get the time then use my real formula to complete the task im so lost pls help a highschool boy out!!! It's also 4am kms Quote Link to comment
Xex Posted December 9, 2017 Report Share Posted December 9, 2017 (edited) So you're saying that you need to find the acceleration that the car must have in order to go 300km/h after driving 400 meters? V final = final velocity = 300km/h YOU MUST CONVERT 300Km/h TO m/s which is 83.3m/s USE GOOGLE FOR THAT V initial = the velocity at the start = 0m/s a = Acceleration = ? x = Distance it has to travel = 400m This is a formula used to find the acceleration (Vfinal)^=(V initial)^ +2ax Vfinal^= 0m/s + 2ax vfinal^= 2ax 300km/h^=2(400)a 300km/h^=800a 300km/h^/800=a 300km/h = 83.4 m/s 83.4m/s^/800=a 6938.89/800=a a = 8.67m/seconds squared That is the acceleration needed to go from zero to (300km/h or 83.3m/s) on a 400 meter 'reach' The time it took? What is t x= V initial + 1/2at^ 400m = 0m/s + 1/2(8.67)t^ 800=8.67 t^ 800/8.67 = t^ t = the square root of 800/8.67 t = the square root of 92.27 t = 9.61 seconds Edited December 9, 2017 by Xex Just took a physics course in college Quote Link to comment
Smoothie Posted December 9, 2017 Author Report Share Posted December 9, 2017 12 minutes ago, Xex said: So you're saying that you need to find the acceleration that the car must have in order to go 300km/h after driving 400 meters? Ye well basically got mad irl threw my books in the wall hate physics!!! Quote Link to comment
Sage fest Posted December 9, 2017 Report Share Posted December 9, 2017 (edited) How fast is it going? Aka inital velocity. Edited December 9, 2017 by Sage fest Quote Link to comment
l DONT NOW Posted December 9, 2017 Report Share Posted December 9, 2017 Min kuk Quote Link to comment
Sage fest Posted December 9, 2017 Report Share Posted December 9, 2017 8 minutes ago, Xex said: Hope I helped I was just gonna point out your mistake but you saw my comment for inital velocity teamwork. Quote Link to comment
Smoothie Posted December 9, 2017 Author Report Share Posted December 9, 2017 57 minutes ago, Sage fest said: How fast is it going? Aka inital velocity. 300km/h! Quote Link to comment
Sage fest Posted December 9, 2017 Report Share Posted December 9, 2017 21 minutes ago, smoothie is back said: 300km/h! That is final velocity m8. 1 Quote Link to comment
Smackd Posted December 9, 2017 Report Share Posted December 9, 2017 I’m the best when it comes to Physics and Chemistry that’s my speciality don’t listen to Xex and Sage they’re both wrong. Quote Link to comment
Tesfxye Posted December 9, 2017 Report Share Posted December 9, 2017 Imagine being this dumb Quote Link to comment
Suor Posted December 9, 2017 Report Share Posted December 9, 2017 (edited) Learn the constant motion equations (SUVAT) we call em here in England. Edited December 9, 2017 by Suor Quote Link to comment
Somalia Posted December 9, 2017 Report Share Posted December 9, 2017 17 minutes ago, Suor said: Learn the constant motion equations (SUVAT) we call em here in England. Ur 14 Quote Link to comment
red spear5 Posted December 9, 2017 Report Share Posted December 9, 2017 1 hour ago, Floyd said: Ur 14 ur gay Quote Link to comment
Pyd Posted December 9, 2017 Report Share Posted December 9, 2017 or just dont do physics, go play runescape instead Quote Link to comment
Xex Posted December 9, 2017 Report Share Posted December 9, 2017 9 hours ago, Smackd said: I’m the best when it comes to Physics and Chemistry that’s my speciality don’t listen to Xex and Sage they’re both wrong. thats why you couldn't answer a question that takes 10 seconds to find the solution. Quote Link to comment
Tesfxye Posted December 9, 2017 Report Share Posted December 9, 2017 5 hours ago, Suor said: Learn the constant motion equations (SUVAT) we call em here in England. Shut up lmfao u do level 2 child care Quote Link to comment
Smoothie Posted December 9, 2017 Author Report Share Posted December 9, 2017 NOBODY GIVING ME THE ANSWER Quote Link to comment
Aqeelxo Posted December 9, 2017 Report Share Posted December 9, 2017 lmao can't believe what i just saw on a raps forums Quote Link to comment
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