Answer:
7.84 s
Explanation:
Ok, one step at a time. We know the mass of the projectile, we know the force. Acceleration is easily obtained from Newton second law:
![\vec F = m\vec a](https://tex.z-dn.net/?f=%5Cvec%20F%20%3D%20m%5Cvec%20a)
.
At this point, we know the acceleration, we know initial and final velocity, we can time the ammount of time it took to get there.
![v= v_0 +at \rightarrow 3.5\times10^3 = 0 + 4.46\times10^4 t\\t= \frac{3.5\times10^3}{4.46\times10^4} = 7.84 s](https://tex.z-dn.net/?f=v%3D%20v_0%20%2Bat%20%5Crightarrow%203.5%5Ctimes10%5E3%20%3D%200%20%2B%204.46%5Ctimes10%5E4%20t%5C%5Ct%3D%20%5Cfrac%7B3.5%5Ctimes10%5E3%7D%7B4.46%5Ctimes10%5E4%7D%20%3D%207.84%20s)
KE = 1/2mv²
= 1/2(100)(4.0²)
KE = 800 J
hope this helps :)
Answer:
mass of the planet and its distance from other objects
Explanation:
mass of the planet and its distance from other objects determine the strength of its gravitational force on other objects