Projectile motion, plz help (1 Viewer)

[ghostman_on_3rd]

hi, how do you this ?
A body is prjected from a point 80m above the ground with a velocity of 20 m/s at an angle of 60 degrees above the horizontal. Assuming the ground horizontal, find when and where it will strike the ground

thanks in advance

 

[Pwnage101]

derive the cartesian equation, but ull have Y= ....... + 80 and solve for x = 0, oe sol. will be negative, so ignore that one and take the positive one

have a go, show ur working, then see if you cant get it..

 

[vds700]

hi, how do you this ?
A body is prjected from a point 80m above the ground with a velocity of 20 m/s at an angle of 60 degrees above the horizontal. Assuming the ground horizontal, find when and where it will strike the ground

thanks in advance

its no different from most projectile questions.

Start with x: = 0, y: = -g, then integrate to find expressions for x and y, substituting in the initial conditions (e.g when t = 0, y = 80). Put y = 0 to find the time when it strikes the ground and sub this time into your eqn for x to find the horizontal distance travelled.

 

[ghostman_on_3rd]

woot i got it


cheers guys