![kaileelmiller71](/avatars/26786.jpg)
kaileelmiller71
20.09.2019 •
Physics
A.25 kg baseball is thrown upward at a speed of 30 m/s. what is the maximum height the ball reaches?
Solved
Show answers
More tips
- F Food and Cooking How to Make Lazy Cabbage Rolls? Simple Steps to a Delicious Dish...
- F Food and Cooking Unusually Delicious Shashlik - Follow the Etiquette of Proper Preparation!...
- L Leisure and Entertainment Couchsurfing: A New Way to Travel...
- G Goods and services Which TV is better - LCD or Plasma?...
- S Sport How to Learn to Pull Up on Monkey Bars?...
- L Leisure and Entertainment Scrapbooking: What is it and Why is it Becoming More Popular?...
- C Computers and Internet Where did torrents.ru move to?...
- B Business and Finance Understanding Cash Flow: What It Is and How It Works...
- C Computers and Internet What Are Peers and Seeds in Torrenting?...
- H Health and Medicine 10 Simple Techniques on How to Boost Your Mood...
Answers on questions: Physics
- P Physics Một hạt có khối lượng m=1,16*10^-16 kg và điện tích q=5*10^9C chuyển động theo quỹ đạo tròn trong từ trường đều có độ lớn B=0,2T và có hướng vuông góc với mp quỹ đạo. Thời...
- P Physics An 8kg ball travelling at 4m/s collides head on with a 3kg ball travelling at 14m/s. Rhe balls bounce off each other and travel back the way they came. The 8kg ball travels...
- P Physics A company wants to install a sensor to monitor the light level in the offices of their buildings. The sensor contains an LDR which has a resistance of 10kohlms in daylight...
- P Physics a 200 g cooper calorimeter contains 150 g of water at 20 °c. the water is added 250 & of aluminum at 100° c. find the temperature of the system after equilibrium is established....
- P Physics To pop a balloon you stab it with a pencil. If the area of the pencil tip is .01 cm² and the pressure applied by the pencil to the balloon is 100 N/ cm², how hard (what force)...
- P Physics a 4.1kg box of books is lifted verticaly from rest a distance of 1.6m with a constant up ward applied force of of 52.7N. find work done by the applied force ;the work done...
- P Physics What are two general characteristics that define each cloud type?...
- P Physics A steel railroad track has a length of 34 m when the temperature is –3°C....
- H History Which idea was the english bill of rights most directly responsible for? a. an unfair government could be dissolved by its citizens. b. the right to vote was a natural right...
- M Mathematics Adrinking cup shaped like a cone has a diameter of 6 inches and a height of 5.5 inches. how much water can it hold?...
Ответ:
the baseball reaches its greatest height in (30/9.8) = 3.06 seconds.
At that instant, its speed is zero.
The baseball's average speed from toss to peak is
(1/2) (30 + 0) = 15 m/s .
At an average speed of 15 m/s for 3.06 seconds,
the ball rises (15 x 3.06) = 45.9 meters.
(We've known for about 500 years now that if air resistance
can be ignored, then the mass makes no difference.
In this solution, I ignored air resistance, because I don't
know any of the 15 or 20 other things that I'd need to know
in order to include it, and if I had them, I wouldn't know how to
use them anyway. That's why we always ignore air resistance
in problems like this, unless we are aeronautical engineers and
have access to some serious electronic computing power.)
Ответ: