how would you calculate the initial velocity of a soccer ball that is being kicked up in the air, and it has a velocity of 23 m/s, and the time is 2s. it was originally on the ground.
2006-12-10 11:18:26 · 3 answers · asked by starbucksluvrxoxo 3 in Science & Mathematics ➔ Physics
vf = vo + at
vo = vf - at.
but a = -g.
2006-12-10 12:48:20 · answer #1 · answered by Juan D 3 · 0⤊ 0⤋
U sure not missing info?
Was it oringinally on the ground, or was it up in the air?
Is this some kind of joke? Why am I taking the time to answer this?
OK, I think I understand now.
I will assume that:
It is a soccer ball initially on the ground, soeone kicks it up in the air, vertically (this will never happen in soccer) and after 2 seconds the ball is travelling vertically at 23m/s (I will assume upwards).
Ok: acceleration is 9.8m/s2 (1g), which means that after 2 seconds the ball reduced its speed in 9.8*2=19.6m/s
I said "reduced" because acceleration is going downwards and I assumed the ball is going upwards.
This means initial speed was 23+19.6=42.6m/s
2006-12-10 20:31:38 · answer #2 · answered by Eng_helper 2 · 0⤊ 0⤋
You need to explain better.
2006-12-10 20:37:06 · answer #3 · answered by sojsail 7 · 0⤊ 0⤋