1. Bob rides his motorcycle 140 km in 3.5 hours. What is his average speed in kilometers per hour?*
Your answer

25.7km/h

Explanation:

Distance= 140km

Time = 3.5hours

Average speed= Distance/Time

= 140/3.5

=25.7km/h

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.