Question

A car initially traveling at 25.9 m/s undergoes a constant negative acceleration of magnitude 1.40 m/s2 after its brakes are applied. (a) How many revolutions does each tire make before the car comes to a stop, assuming the car does not skid and the tires have radii of 0.330 m? rev (b) What is the angular speed of the wheels when the car has traveled half the total distance? ______rad/s

Answer #1

use equation of kinematics to find the distance travelled and use that to find the number of revolutions for the tire as shown below.

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A car initially traveling at 25.7 m/s undergoes a constant
negative acceleration of magnitude 1.80 m/s2 after its
brakes are applied.
(a) How many revolutions does each tire make before the car
comes to a stop, assuming the car does not skid and the tires have
radii of 0.320 m?
rev
(b) What is the angular speed of the wheels when the car has
traveled half the total distance?
rad/s

A car initially traveling at 25.7 m/s undergoes a constant
negative acceleration of magnitude 1.50 m/s2 after its
brakes are applied.
(a) How many revolutions does each tire make before the car
comes to a stop, assuming the car does not skid and the tires have
radii of 0.350 m?
(b) What is the angular speed of the wheels when the car has
traveled half the total distance?

A car initially traveling at 29.2 m/s undergoes a constant
negative acceleration of magnitude 2.00 m/s2 after its
brakes are applied
(a) How many revolutions does each tire make before the car
comes to a stop, assuming the car does not skid and the tires have
radii of 0.300 m?
(b) What is the angular speed of the wheels when the car has
traveled half the total distance?
rad/s

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negative acceleration of magnitude 2.00 m/s2 after its
brakes are applied.
(a) How many revolutions does each tire make before the car
comes to a stop, assuming the car does not skid and the tires have
radii of 0.320m?
Answer: 98.9
(b) What is the angular speed of the wheels when the car has
traveled half the total distance?
Answer: ?

A car traveling at
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condition were unchanged (i.e. if the acceleration were the
same)?

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A car is traveling at 15 m/s on a horizontal road. The brakes
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c. 14.7 s
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the acceleration were the same)?

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