physics stuff?

1 ⤊

If the net force of 7 N was continuously applied on 400 g object at rest, how long will it take to raise its velocity to 80 m/s?

answer is in s (seconds)

2007-06-10 11:23:21 · 3 answers · asked by inzane555 2 in Science & Mathematics ➔ Physics

3 answers

u=0,v=80m/s,t=?
F=7n,m=400g=0.400kg.
a=F/m=7/0.400=17.5m/s^2
v=u+at
80=0+17.5t
t=80/17.5=4.57s

2007-06-10 11:31:09 · answer #1 · answered by Anonymous · 1⤊ 0⤋

Find the acceleration of the object using Newton's 2nd Law and use the kinematics equations.

2007-06-10 11:30:10 · answer #2 · answered by msi_cord 7 · 0⤊ 1⤋

4.6 seconds

2007-06-10 11:35:14 · answer #3 · answered by ≈ nohglf 7 · 0⤊ 0⤋