Projectile motion

[DrkCould]

1. The problem statement, all variables and given/known data
An object was lauch at uknow velocity at an angle of 70 degree in the X direction. After 4 second later it land. The distance was 800 meter. Find the Vo of the object. What Vo is compose of?


2. Relevant equations
t= 4 sec
distance travel= 800
angle= 70


3. The attempt at a solution
x= Vocos(u)T and T= 2VoSin/g
X/(cos(u)*t)= Vo

the twon Vo did not match is there any other way to find the solution

[LowlyPion]

1. The problem statement, all variables and given/known data
An object was lauch at uknow velocity at an angle of 70 degree in the X direction. After 4 second later it land. The distance was 800 meter. Find the Vo of the object. What Vo is compose of?


2. Relevant equations
t= 4 sec
distance travel= 800
angle= 70


3. The attempt at a solution
x= Vocos(u)T and T= 2VoSin/g
X/(cos(u)*t)= Vo

the twon Vo did not match is there any other way to find the solution

With the information given the x/(t*Coos70) = Vo is the only one to be trusted, because the g of the top equation may not be on earth.