coronadenise
12.06.2020 •
Physics
A fast pitch softball player does a "windmill" pitch moving her hand through a vertical circular arc to pitch a ball at 71mph. The 0.20 kg ball is 53 cm from the pivot point at her shoulder.Just before the ball leaves her hand, what is its centripetal acceleration?
Solved
Show answers
More tips
- G Goods and services What Are the Most Popular Services?...
- O Other What is the oldest joke ever told?...
- L Legal consultation How to Properly Inherit: Tips and Recommendations...
- C Computers and Internet Boost your processor performance with these easy tips...
- S Sport How does Bodyflex work: what is it and how does it work?...
- H Health and Medicine How to Whiten Teeth and Get the Perfect Smile...
- S Style and Beauty How to Properly Apply Eye Makeup: Tips from a Professional Makeup Artist...
- A Auto and Moto How Can Parking Sensors Help Drivers?...
- C Computers and Internet Make Money Online: Secrets and Essential Ways...
- A Auto and Moto What is the Average Lifespan of an Engine in a Car?...
Answers on questions: Physics
- P Physics Abiologist looking through a microscope sees a bacterium at r⃗ 1=2.2i^+3.7j^−1.2k^μm(1μm=10−6m). after 6.2 s , it s at r⃗ 2=4.6i^+1.9k^μm. find average speed...
- P Physics Electric current is the flow of which of the following through a wire? • electrons • protons • neutrons • protons and electrons...
- P Physics An all female guitar septet is getting ready to go on stage. the lead guitarist, kira,who is always in tune, plucks her low e string and the other six members, sequentially,...
- P Physics Amotor with an operating resistance of 32 ohms is connected to a voltage source. the current in the circuit is 3.8 a. what is the voltage of the source?...
- P Physics Amicrowave oven operates at 2.50 ghz . what is the wavelength of the radiation produced by this appliance?...
- P Physics A12.0 kg rock slides off the edge of a bridge and falls into the water 25.0 meters below. what is the kinetic energy of the rock just as it hits the water?...
- P Physics A10 kg runaway grocery cart runs into a spring with spring constant 250 n/m and compresses it by 60 cm. what was the speed of the cart just before it hit the spring?...
- P Physics Which of these is a covalent compound? A. A1C1 3 B. MgO C. LiC1 D. CO...
- M Mathematics A scientist measures the initial amount of carbon-14 in a substance to be 25 grams . A= 25e^-0.00012t In how many years will the substance contain exactly 20 grams (g) of carbon-14?...
- B Business Salisbury Corporation has been producing and selling 30,000 caps a year. The company has the capacity to produce 50,000 caps with its present facilities. The following information...
Ответ:
w = 0.189 rad/ s
Explanation:
This exercise we work with the conservation of the moment, the system is made up of the merry-go-round and the child, for which we write the moment of two instants
Initial
L₀ = I₀ w₀
Final
= I w
L₀ = L_{f}
I₀ w₀ = I_{f} w
.w = I₀/I_{f} w₀
The initial moment of inertia is
I₀ = 500 kg. m2
The final moment of inertia
= 500 + m r²
I_{f} = 500 + 20 1.5
I_{f} = 530 kg m²
Initial angular velocity
w₀ = 0.20 rad / s
Let's calculate
w = 500/530 0.20
w = 0.189 rad / s