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Projectiles

Im struggling with this becuase im unsure of which formula to use for like time taken or horizontal component.

I know horizonal component is Cos
Vertical is Sine

the 4 formulas needed to be used makes me baffed.

S=U+1/2at squared
v=u+at

cant remember other 2 or three any help?
v(squared) = u(squared) + 2as
ux=ucos⁡θuy=usin⁡θvx=uxvy=uy+atx=uxty=uyt+12at2vy2=uy2+2ay u_x = u \cos \theta \newline u_y = u \sin \theta \newline v_x = u_x \newline v_y = u_y + at \newline x = u_x t \newline y = u_y t + \frac{1}{2} a t^2 \newline {v_y}^2 = {u_y}^2 + 2 a y

Where:

Subscripts
Horizontal component: x
Vertical component: y

u - initial velocity
x - horizontal displacement
y - vertical displacement
v - final velocity
a - acceleration
Reply 3
Avatar for -G-a-v-
-G-a-v-
16
to be honest, in practice you only really need those 3. s=0.5(u+v)t may be useful now and then, but generally those 3 should be enough.
thanx, my teacher explains it so difficult.

Horizontal Component, Moments and im doing momentum 2more, any b'ground info on that.

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