phsical
posted by abu .
A ball is tossed vertically upward from a height of 2 m with an initial velocity
of 10 m/s. Just before the ball hits the ground, its velocity will be what?

phsical 
Henry
Vf^2 = Vo^2 + 2gd,
d = ((Vf^2Vo^2) / 2g) + 2,
d=((0100) / 19.6) + 2=5.1 + 2 =7.1m
= Distance from Gnd.
Vf^2 = Vo^2 + 2gd,
Vf^2 = 0 + 2*9.8*7.1 = 139.16,
Vf = 11.8m/s.
Respond to this Question
Similar Questions

calculus
If a ball is thrown vertically upward from the roof of 64 foot building with a velocity of 64 ft/sec, its height after t seconds is s(t)=64+64t–16t2 . What is the maximum height the ball reaches? 
Calculus
If a ball is thrown vertically upward from the roof of 32 foot building with a velocity of 112 ft/sec, its height after t seconds is s(t)=32+112t–16t2 . What is the maximum height the ball reaches? 
math
If a ball is thrown vertically upward from the roof of 32 foot building with a velocity of 80 ft/sec, its height after t seconds is s(t)=32+80t–16t2. What is the maximum height the ball reaches? 
calculas
If a ball is thrown vertically upward from the roof of 48 foot building with a velocity of 80 ft/sec, its height after t seconds is s(t)=48+80t–16t2. What is the maximum height the ball reaches? 
physics
A ball is thrown from the top of a building with an initial velocity of 30m/s straight upward, at an initial height of 50m above the ground. The ball just misses the edge of the roof on is way down and hits the ground. Determine: a) … 
physics
A ball is tossed so that it bounces off the ground, rises to height of 2 m, and then hits the ground again 0.75 m away from the first bounce. a. How long is the ball in the air between the two bounces? 
Physics
A ball is shot from the ground into the air. At a height of 9.1 m, the velocity is observed to be v = (6.6 + 5.7 ) m/s, with horizontal and upward. (a) To what maximum height does the ball rise? 
Physics
A ball is thrown from the top of a building with an initial velocity of 30m/s straight upward, at an initial height of 50m above the ground. The ball just misses the edge of the roof on is way down and hits the ground. Determine: a) … 
College Calculus
If a ball is thrown vertically upward from the roof of 48 foot building with a velocity of 96 ft/sec, its height after t seconds is s(t)=48+96t−16t^2. What is the maximum height the ball reaches? 
physics
A ball is tossed vertically upward with an initial speed of 18.2 m/s. How long does it take before the ball is back on the ground?