Effects of Gravity on Earth

mathxyz · 2024-03-12 01:05:43

If a rock falls from a height of 20 meters on Earth, the height H, in meters, after x seconds is approximately H(x) = 20 - 4.9x^2.

A. What is the height of the rock when x = 1.3 seconds?

We are looking for H(1.3). Yes?

B. When is the height of the rock 5 meters?

We are looking for x when H(x) = 5 meters.

Yes?

C. When does the rock hit the ground?

We are looking for x when H(x) = 0.

Yes?

.

amnkb · 2024-03-12 01:07:11

A. yes
B. yes
C. yes

mathxyz · 2024-03-12 11:46:24

amnkb wrote:

A. yes
B. yes
C. yes

Good. Thanks.

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