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30 September, 20:25

A stone that starts at rest free falls for 7.0 s. How far does the stone fall in this time?

a.

+2.4 x 102 m

c.

+3.4 x 101 m

b.

-3.4 x 101 m

d.

-2.4 x 102 m

+2
Answers (1)
  1. 30 September, 20:41
    0
    Gravity = 9.8 m/s^2 (because we are figuring the distance an object fell, gravity becomes a negative value so use - 9.8).

    Using the distance formula:

    Distance = 1/2 x - 9.8 x 7^2

    Distance = - 240.1

    Written in scientific notation = - 2.4 x 10^2
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