A stone is dropped from the roof of a tall building. A person measures the speed of the stone to be 49 m/sec when it hits the ground. The height of the building is closest to:

Select one:

a. 24 meters.

b. 49 meters.

c. 122 meters.

d. 245 meters.

Question

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Mathematics

6 June, 18:27

A stone is dropped from the roof of a tall building. A person measures the speed of the stone to be 49 m/sec when it hits the ground. The height of the building is closest to:

Select one:

a. 24 meters.

b. 49 meters.

c. 122 meters.

d. 245 meters.

+1

Answers (1)

Know the Answer?

Nancy Long · Answer 1

V^2 = u^2 + 2gh

since the stone is dropped, the initial speed is 0.

v^2 = 2gh

49^2 = 2 x 9.8 x h

h = 2401 / 19.6 = 122.5 meters

The height of the building is closest to 122 meters.

A stone is dropped from the roof of a tall building. A person measures the speed of the stone to be 49 m/sec when it hits the ground. The height of the building is closest to:Select one:a. 24 meters.b. 49 meters.c. 122 meters.d. 245 meters.

A stone is dropped from the roof of a tall building. A person measures the speed of the stone to be 49 m/sec when it hits the ground. The height of the building is closest to:

Select one:

a. 24 meters.

b. 49 meters.

c. 122 meters.

d. 245 meters.