Solving for Time and Distance of a Rolling Ball

[kcc732]

Homework Statement

Chuck gives a horizontal speed v to a ball that then rolls off a lab bench y meters high. How long a time will it take the ball to reach the floor? How far from a point on the floor directlyt below the edge of the bench will the ball land? Calculate how long and how far for v=1.5 m/s and a bench height of 1.2 m.

Homework Equations

Vx=d/t? only horizontal component of velocity is relevant, right?

The Attempt at a Solution

confused

 

[Delphi51]

The question definitely involves both horizontal and vertical motion.
Better write equations for the y part, too. Usually one for Vy and one for y suffice.

 

[kza62]

hey kcc
aight so when ur doing projectile motion try using this equation to find t:
t = √(2y/g)
and now that u have t u can use the formula V=x/t to find x or arrange it so that its x=vt
:D et voila'