If an object is thrown vertically upward with a velocity g, how high will it rise?

Think it through first, then pick an option.

Answer and explanation

Correct answer: b 4.9 m

With u = g = 9.8 m/s, h = u²/2g = g²/2g = g/2 = 4.9 m.

Why the other options are wrong

a 1 m: 1 m comes from no correct step. With u = 9.8 m/s, h = u²/2g = g/2 = 4.9 m.
c 9.8 m: 9.8 is the value of u, not the height. The height is u²/2g, which is half of it.
d 96.04 m: 96.04 is u² = 9.8², the division by 2g is missing. h = 96.04/19.6 = 4.9 m.