Acar slowing down for a stop sign is an example of? a. negative speed b. negative acceleration c. positive speed d. positive acceleration ( )

the correct choice is

b. negative acceleration

acceleration is given as rate of change of velocity and is given by the formula

a = (v - v₀)/t

where a = acceleration , v = final velocity, v₀ = initial velocity , t = time

as the car slows down , the final velocity is smaller than the initial velocity.

v < v₀

so (v - v₀) < 0

so acceleration = a =  (v - v₀)/t

since (v - v₀) < 0

hence a < 0

so the acceleration is negative

B. negative acceleration

you have to draw the persons position over there

the box does not move because you need to use a force greater than 300 n. you are only using 50 n. it needs to at least be 301 n for the box to move because then it is an unbalanced force and it will move the way that the greater force is pushing it. if you use only 300 n it will be a balanced force and will not move because the force you are exerting on the   box is the same as its force.

hope this !

im sorry if i went too in depth, i am going to include a link to a video on khan academy that will explain this.   hope that you like the video and that it explains more in detail to you.

that is the link.