Recent content by forrestuv

really hard for me...I'm just a programmer :( could you be go into details a little more? would it require much time for you to write the final formula to calculate the initial velocity to make the object reach a destination point, crossing a fence? I'm not able to do all the calculations...

Homework Statement I need to throw an Object over a fence at a destinationPoint reached in a given time startPointX=0 startPointY=0.4 destpointX=25 destpointY=0 time=3 fence height=1 fence posX = 10 The Attempt at a Solution I decided to split up the problem in two components X,Y...

alternatively: Giving a fixed Initial Speed, If I want to double the distance at which the object will be at a certain time, how much should I increase time of?

Now I would like to obtain something impossible to calculate for me :) I need to know the min Initial speed needed to have, at a certain time a distance greater than a number. example: if I throw a ball at an initial speed of 12 I want to be sure that at 2 secs the distance is greater than...

thxxxxxx! I appreciated your help very very much :)

in my case: h=7 mt t=3 secs g=9.8 initial speed = (distance - (1/2 × acceleration × time^2)) / time initial speed= (h- (1/2 × g × t^2)) / t (7-(0.5x9.8x9)) / 3 (7-44.1) / 3 = -12.3666 can you check if it is correct please ? :)

distance = 1/2 × acceleration × time^2 + intial speed × time ok so: intial speed × time = distance - (1/2 × acceleration × time^2) then: initial speed = (distance - (1/2 × acceleration × time^2)) / time is it right? :)

C=a-b ? :)

ops.. yes I need the initial speed..how to obtain that from the formula I posted?I'm a real noob in math :(

With this formula for distance calculation with gravity acceleration: distance = 1/2 × acceleration × time^2 + intial speed × time what Initial Acceleration does an object need to touch the ground in 3secs from 7meters of heigth? what's the formula for that? thx