If you jump off a 7 m diving platform, how long will it take you to hit the
water?
a. 1.63 s
b. 1.88 s
c. 1.205
d. 1.45 s

C.) T = 1.20s

Explanation:

From equation of motion,

S = ut + ½gt²

S = 7m

g = 9.8m/s²

U = 0m/s (since he starts from rest)

t = ?

S = ut + ½gt²

7 = 0 * t + ½ * 9.8 * t²

7 = 0 + 4.9t²

t² = 7 / 4.9

t² = 1.42857

t = √(1.42857)

t = 1.195s

t = 1.20s

3. dark matter

empty space could also be a simple vacuum