Amodel rocket climbs 200 m in 4 seconds. if was moving 10 m/s to begin with what is its final velocity

90 m/s

Explanation:

For this situation we will use the following equations:

(1)  

(2)  

Where:  

is the height of the model rocket at 4 s

is the initial velocity of the model rocket

is the velocity of the rocket at 4 s

is the time it takes to the model rocket to reach 200 m

is the constant acceleration due gravity and the rocket's thrust

Firstly, from equation (1) we have to find :

(3)  

(4)  

Now we have to substitute this value of in (2):

(5)  

Finally:

This is the rocket's final velocity

jupiter is the largest planet in our solar system, having a mass and radius that are respectively, 318 and 11.2 times that of earth. suppose that an object falls from rest near the surface of each planet and that the acceleration due to gravity remains constant during the fall. each object falls the same distance before striking the ground. determine the ratio of the time of fall on jupiter to that on earth.