A parachute slows a skydiver from 85 m/s
to 45 m/s in 4.5 seconds? What is the
acceleration of the parachute?
A. 8.9 m/s2
B. -8.9 m/s
2
C. 0.1 m/s2
D. -0.1 m/s
2
Solved
Show answers
More tips
- C Computers and Internet How to Get Rid of Spam in ICQ?...
- A Art and Culture Who Said The Less We Love a Woman, the More She Likes Us ?...
- F Family and Home How to Get Rid of Your Neighbors?...
- S Society and Politics How Could Nobody Know About the Dead Mountaineers?...
- H Health and Medicine How to Cure Adenoids?...
- H Health and Medicine Why Wearing a Back Brace Can Be Beneficial During Back Strain?...
- S Sport When and Where Will the 2014 World Cup be Held?...
- C Computers and Internet How to Choose a Monitor?...
- H Horoscopes, Magic, Divination Where Did Tarot Cards Come From?...
Answers on questions: Chemistry
- C Chemistry In a steam engine, steam at 140°C in a turbine does work on an external system, and the steam leaves the turbine at 100°C. The efficiency of the steam engine is 5%....
- C Chemistry Which of the following terms describes a transfer of energy? a. internal energy b. heat c. temperature d. kinetic energy...
- C Chemistry How many moles are in 48.1 grams of FeF3?...
- C Chemistry A substance with a pH of 10 is how much more basic than a substance with a pH of 2?...
- C Chemistry What is a cost of using coal? 1. Each stage of mining and using coal produces pollution. 2. The cost of coal is high. 3. The United States has an little coal. 4. It...
- C Chemistry Guía resuelta fase 2 semana 3 ciencias 9° grado...
- C Chemistry The alpha decay of what isotope of what element produces lead-206? the alpha decay of what isotope of what element produces lead-206? mercury-202 thallium-204 bismuth-208...
- C Chemistry The slowest step of a reaction mechanism is called the a.) elementary step b.) inhibitor c.) rate law d.) rate-determining step...
- C Chemistry Which statement is incorrect for preparing a buret for a titration? select one: a. on a buret, the zero mark is at the top, so a buret is read from top to bottom....
- C Chemistry True/false1. fossil fuels can be replenished in a human lifetime...
Ответ:
Explanation:
Acceleration is found by dividing the change in velocity by the change in time.
The parachute slows from 85 m/s to 45 m/s. Therefore, the final velocity is 45 meters per second and the initial velocity is 85 meters per second. The time is 4.5 seconds.
Substitute the values into the formula.
Solve the numerator and subtract.
Divide.
If we round this to the nearest tenth, the 8 in the hundredth place tells us to round the 8 up to a 9.
The acceleration of the parachute is approximately -8.9 meters per square second. The value is negative because the parachute is slowing down.
Ответ:
B
Explanation: