Help with Projectile Motion

[physics_challenged]

Hi, can someone please tell me how to figure out the initial (horizontal) velocity of a ball that rolls horizontally off a cliff at a height of 1.5 m from the ground, and lands 3 m away from the edge of the cliff?

[TenaliRaman]

u_horizontal *t = 3
1.5 = 0*t+(1/2)*g*t^2

-- AI

[Tide]

How long does the ball take to reach the ground? How fast does it have to travel horizontally to be 3 m out in that time?

[physics_challenged]

How long does the ball take to reach the ground? How fast does it have to travel horizontally to be 3 m out in that time?


The problem is....the question doesn't give the time or speed. :cry:

[Pyrrhus]

You can always combine equations.

[physics_challenged]

u_horizontal *t = 3
1.5 = 0*t+(1/2)*g*t^2

-- AI

Yes, that worked. Thanks a bunch! :smile: