For how long should a force of 100n act on a body of mass 20kg at rest so that it acquires a velocity of 100m/s?

20 s

Explanation:

Impulse = change in momentum

F Δt = m Δv

100 N Δt = 20 kg × (100 m/s − 0 m/s)

Δt = 20 s

because it says use -2,0,and 2 for x, we can plug those numbers into the equation. y/4=3/4(-2)+2   y/4= -1 1/2 +2 now to get x by itself, we can multiply each side by 4. y=-6+8 which equals y=2 when x=-2. now you can do the same thing with 0 and 2 as x. you get y=8 when x=0 and y=14 when x=2.

x   |   y

-2 |   2

0   |   8

2   |   14