In winter, after a snowfall, many people have trouble getting the car out of the driveway if the garage is below the level of the road. if the coefficient of static friction between tires of normal wear and snow is 0.14, what is the maximum incline of a driveway so that a four- wheel-drive vehicle can get up on the road during the winter?

What property is a characteristic of a substance that can be observed and does not change the identity of the substance

The ratio of lift to drag l/d for a wing or airfoil is an important aerodynamic parameter, indeed, it is a direct measure of the aerodynamic efficiency of the wing. if a wing is pitched through a range of angle of attack, l/d first increases, then goes through a maximum, and then decreases. consider an infinite wing with an naca 2412 airfoil. estimate the maximum value of l/d. assume that the reynolds number is 9x10^6.

Aperson walks first at a constant speed of 4.89 m/s along a straight line from point a to point b and then back along the line from b to a at a constant speed of 2.95 m/s. what is the average speed over the entire trip?