Aball is thrown upwards. after 2.5s, it has risen 50m. at what velocity was it thrown upwards? assume g = 10m/s squared.

32.5 m/s

Explanation:

Given:

Δy = 50 m

a = -10 m/s²

t = 2.5 s

Find: v₀

Δy = v₀ t + ½ at²

(50 m) = v₀ (2.5 s) + ½ (-10 m/s²) (2.5 s)²

v₀ = 32.5 m/s

i am pretty sure it is c because when people are closer together, they cannot move as freely. picture being in a mostly full elevator, for instance. the people are right next to you, and you can barely move.

the closer the planet is to the sun, the larger the gravity