A ferry is crossing a river. The ferry is headed due north with a speed of 1.7 m/s
relative to the water and the river’s velocity
is 4.8 m/s to the east.
What is magnitude of the boat’s velocity relative to the earth
answer in units of m/s

think about the oscillation of the toy shown in the video. when the toy is at the highest point of its motion, its velocity is zero and its acceleration is negative.

this is a good question! i'll do some research and come back when i have the answer!

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.