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11 votes
11 votes
Question 2 (2 points)

A marble dropped from the Foshay Tower in Minneapolis hits the ground at 52 m/s. How high is the Foshay tower?

User Vbullinger
by
3.0k points

1 Answer

20 votes
20 votes

Answer:

Height of the Foshay tower is 138 m

Step-by-step explanation:

Using the third equation of uniformly-accelerated motion under gravity:

v² = u² + 2gh

Where v is final velocity,

u is initial velocity,

g is acceleration due to gravity,

and h is height

v = 52 m/s;

u = 0 (since the marble was dropped from rest at a height above the ground);

g = 9.8 m/s²,

h = ?

(52 m/s)² = 0 + 2 × 9.8 m/s² × h

2704 m²/s² = 19.6 m/s² × h

h = 2704 m²/s² / 19.6 m/s²

h = 138 m

Therefore, height of the Foshay tower is 138 m

User Sherif Ahmed
by
2.7k points
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