61=4.9*t^2

Solution for 61=4.9*t^2 equation:

Simplifying
61 = 4.9t2

Solving
61 = 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.
61 + -4.9t2 = 4.9t2 + -4.9t2

Combine like terms: 4.9t2 + -4.9t2 = 0.0
61 + -4.9t2 = 0.0

Add '-61' to each side of the equation.
61 + -61 + -4.9t2 = 0.0 + -61

Combine like terms: 61 + -61 = 0
0 + -4.9t2 = 0.0 + -61
-4.9t2 = 0.0 + -61

Combine like terms: 0.0 + -61 = -61
-4.9t2 = -61

Divide each side by '-4.9'.
t2 = 12.44897959

Simplifying
t2 = 12.44897959

Take the square root of each side:
t = {-3.528311153, 3.528311153}