90.8k views
1 vote
An object is dropped from a 32 m tall building. How fast will it be going when it strikes

the ground?

User Poorkenny
by
3.2k points

1 Answer

3 votes

Answer: 25.04m/s

Step-by-step explanation:

v^2 = v^2o + 2a(x-xo)

v^2 = velocity

v^2o = initial velocity

a = acceleration

x = final position/distance

xo = initial position/distance

In this case, the initial velocity is 0 since the ball wasn't moving before it was dropped. The final position is 32 as the motion ended after the ball traveled 32m. The initial position is 0. The acceleration is 9.8m/s (free fall). Plug these numbers into the formula:

v^2 = 0 + 2(9.8)(32)

v^2 = 25.04396135

Round to get 25.04m/s

User Richard Burkhardt
by
3.6k points