Aspacecraft is in orbit around mars. suppose that it was previously observed to have speed 5 km/sec while at a distance r = 5000 km from planet center. suppose it is now at a distance r = 6000 km from planet center. what speed would you expect it to be traveling at now? note that for mars we have gmmars = µmars ' 42, 828 km3 /sec2

V' = 4.56Km/s

Explanation:

We can use the formula of Orbital Speed, who say,

The relative velocity is given by,

We need to find the relation between the two speeds,

Substituting,

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.

a skateboard rolling across the street - apex