1. The time it will take the penny to reach the ground is 11.95s
2. the velocity of the penny is 117.1 ms⁻¹
Motion under gravity refers to the movement of objects influenced solely by Earth's gravitational force.
Near the surface, all objects experience a constant acceleration, denoted as
9.8m/s² , downward.
This acceleration causes freely falling objects to accelerate uniformly, demonstrating motion under gravity.
1. H = ½gt²
700 = ½ × 9.8 × t²
t² = 142.86
t = √142.86
t = 11.95sec
2. The velocity of the penny upon the impact is
v = u + gt
u = 0
v = 9.8 × 11.95
v = 117.1 ms⁻¹