If a car was cruising down the highway at 80 km/hr, how fast would the people inside the car be traveling?

You've already seen the value of 9.8 in this lesson. what's this value called? what quantity does it represent?

The drag force, fd, imposed by the surrounding air on a vehicle moving with velocity v is given by fd = cdaρv 2/2 where cd is a constant called the drag coefficient, a is the projected frontal area of the vehicle, and ρ is the air density. an automobile is moving at v = 80 kilometers per hour with cd = 0.28, a = 2.3 m2, and ρ = 1.2 kg/m3.

What is the moment of inertia i of this assembly about the axis through which it is pivoted? express the moment of inertia in terms of mr