An electric motor rotating a workshop grinding wheel at a rate of 1.31 ✕ 102 rev/min is switched off. assume the wheel has a constant negative angular acceleration of magnitude 3.40 rad/s2. (a) how long does it take for the grinding wheel to stop? (b) through how many radians has the wheel turned during the interval found in (a)?
Solved
Show answers
More tips
- H Health and Medicine Flu: How to Recognize It by the First Symptoms?...
- F Food and Cooking How to Sober Up Quickly? Important Facts and Tips...
- H Health and Medicine How to Properly Take a Blood Sugar Test?...
- H Health and Medicine Simple and Effective: How to Get Rid of Cracked Heels...
- O Other How to Choose the Best Answer to Your Question on The Grand Question ?...
- L Leisure and Entertainment History of International Women s Day: When Did the Celebration of March 8th Begin?...
- S Style and Beauty Intimate Haircut: The Reasons, Popularity, and Risks...
- A Art and Culture When Will Eurovision 2011 Take Place?...
- S Style and Beauty How to Choose the Perfect Hair Straightener?...
- F Family and Home Why Having Pets at Home is Good for Your Health...
Answers on questions: Physics
- P Physics The purpose of an action plan is to...
- P Physics Atugboat pulls a ship with a constant net horizontal force of 5.00 x 10 to the 3 power n and causes the ships to move through a harbor how much work is done on...
- P Physics Of roller coaster car rapidly picks up speed as it rose down a slope as it starts down the slope, its speed is 4m/s . but 3 seconds later at the bar got bottom...
- P Physics 4. a 40 kg child and a 30 kg child want to balance themselves on a 4 meter, 50 kilogramn see-saw. where should the fulcrum be placed?...
- P Physics the emissivity of tungsten is approximately 0.65.A tungsten sphere 1cm in radius is suspended within a large evacuated enclosure whose walls are 400K.what power...
- P Physics The addition of 9.5 X 110^5 J of thermal energy is required to convert a block of ice at –15 °C to water at 15 °C. What was the mass of the block of ice?...
- P Physics How do you make camping fun?...
- P Physics What two factors affects the rate of acceleration of an object?...
- P Physics Ineed with the last question- it’s very simple...
- P Physics How many significant figures are in 107 moles of sodium...
Ответ:
(a) 4.03 s
The initial angular velocity of the wheel is
The angular acceleration of the wheel is
negative since it is a deceleration.
The angular acceleration can be also written as
where
t is the time it takes for the wheel to stop
Solving for t, we find
(b) 27.6 rad
The angular displacement of the wheel in angular accelerated motion is given by
where we have
t = 4.03 s is the total time of the motion
Substituting numbers, we find
Ответ:
I think no B
if wrong correct me pls
have a nice day
#Captainpower
좋은 하루 되세요
#캡틴 파워