In the video the guy launches a rocket pumping only 25 times with air inside, wh
ID: 1284234 • Letter: I
Question
In the video the guy launches a rocket pumping only 25 times with air inside, which didn't sent the rocket far, but on the second try he adds 1/3 of water and pumps 25 times then launches a rocket, which send it flying farther than air itself. With that being said, can someone help me answer this question because we only get one chance of getting full credit. First, launch the video below. You will be asked to use your knowledge of physics to predict the outcome of an experiment. Then, close the video window and answer the question at right. You can watch the video again at any point. Suppose we repeat the experiment from the video, but this time we use a rocket three times as massive as the one in the video, and in place of water we use a fluid that is twice as massive (dense) as water. If the new fluid leaves the rocket at the same speed as the water in the video, what will be the ratio of the horizontal speed of our rocket to the horizontal speed of the rocket in the video after all the fluid has left the rocket? (Ignore air resistance.)Explanation / Answer
since fluid density is twice thrust force will double but mass is tripled so velocity will be 2/3 of previous