During a very quick stop, a car deceleraes at 7.00 m/s^2. a. What is the angular acceleration of its 0.280-m-radius tires, assuming they do not slip on the pavement? Answer: 25.0 rad/sec^2 b. How many revolutions do the tires make before coming to rest, given their initial angular velocity is 95.0 rad/s? Answer: 28.7 turns c. How long does the car take to stop completely? 3.8 sec d. What distance does the car travel in this time? e. What was the car’s initial velocity? f. Do the values obtained seem reasonable, considering that this stop happens very quickly? Note: I only need subpart d. to f. Answers
Angular speed, acceleration and displacement
Angular acceleration is defined as the rate of change in angular velocity with respect to time. It has both magnitude and direction. So, it is a vector quantity.
Angular Position
Before diving into angular position, one should understand the basics of position and its importance along with usage in day-to-day life. When one talks of position, it’s always relative with respect to some other object. For example, position of earth with respect to sun, position of school with respect to house, etc. Angular position is the rotational analogue of linear position.
During a very quick stop, a car deceleraes at 7.00 m/s^2.
a. What is the
the pavement? Answer: 25.0 rad/sec^2
b. How many revolutions do the tires make before coming to rest, given their initial
c. How long does the car take to stop completely? 3.8 sec
d. What distance does the car travel in this time?
e. What was the car’s initial velocity?
f. Do the values obtained seem reasonable, considering that this stop happens very
quickly?
Note: I only need subpart d. to f. Answers
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