Answer :
Final answer:
The angular velocity of the rotating tires is 123.125 rad/s and 1173.062 rev/min. Therefore, the correct answer is d) 1000 RPM.
Explanation:
To find the angular velocity of the rotating tires, we need to convert the linear velocity of the truck to angular velocity. The formula to calculate angular velocity is angular velocity = linear velocity / radius.
In this case, the radius of the tires is given as 0.320 m and the linear velocity of the truck is given as 39.4 m/s.
Substituting these values into the formula, we get:
angular velocity = 39.4 m/s / 0.320 m = 123.125 rad/s
To convert this angular velocity to revolutions per minute (RPM), we need to multiply it by 60 (since there are 60 seconds in a minute) and divide by 2π (since there are 2π radians in one revolution). Therefore, the angular velocity in rev/min is:
angular velocity (rev/min) = (123.125 rad/s * 60) / (2π) = 1173.062 rev/min
Therefore, the correct answer is d) 1000 RPM.