100=4.9t^2

Solution for 100=4.9t^2 equation:

Simplifying
100 = 4.9t2

Solving
100 = 4.9t2

Solving for variable 't'.

Move all terms containing t to the left, all other terms to the right.

Add '-4.9t2' to each side of the equation.
100 + -4.9t2 = 4.9t2 + -4.9t2

Combine like terms: 4.9t2 + -4.9t2 = 0.0
100 + -4.9t2 = 0.0

Add '-100' to each side of the equation.
100 + -100 + -4.9t2 = 0.0 + -100

Combine like terms: 100 + -100 = 0
0 + -4.9t2 = 0.0 + -100
-4.9t2 = 0.0 + -100

Combine like terms: 0.0 + -100 = -100
-4.9t2 = -100

Divide each side by '-4.9'.
t2 = 20.40816327

Simplifying
t2 = 20.40816327

Take the square root of each side:
t = {-4.517539515, 4.517539515}