How many revolutions do the wheels make when a car decelerates from 60 mph to 0 mph over 122 ft?

To determine the number of revolutions the wheels make while a car decelerates from 60 mph to 0 mph over a distance of 122 feet, we can follow these steps:

1. Convert the speed from mph to feet per second:

Since there are 5280 feet in a mile and 3600 seconds in an hour, 60 mph can be converted to feet per second as follows:

[

60 , \text{mph} = 60 \times \frac{5280 , \text{feet}}{1 , \text{mile}} \times \frac{1 , \text{hour}}{3600 , \text{seconds}} = 88 , \text{feet per second}

]

2. Use the formula for displacement:

The distance while decelerating can be calculated using the kinematic equation:

[

v^2 = u^2 + 2a d

]

where (v) is the final velocity (0 ft/s), (u) is the initial velocity (88 ft/s), (a) is the acceleration (deceleration, which