17. a car traveling initially at 5.5 mis accelerates at a rate of 1.2 m/s's for 23 seconds. what is its velocity at the
end of the acceleration?

33.1 m/s

Explanation:

where v is final velocity of the car   is initial velocity of the car, a is acceleration due to gravity and t is time taken by the car. The final velocity is the velocity at the end of acceleration.

In this question, = =5.5m/s, t=23 seconds, a=

Substituting the above figures into the equation we obtain

v=5.5+(1.2*23)=33.1 m/s

Therefore, the velocity of the car at the end is 33.1m/s

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.

c) up is the direction the magnetic force is acting on the charge.