Two vehicles of mass m and 2m are moving in the same direction on a highway. both drivers apply their brakes at the same time and both vehicles begin sliding. if the coefficient of kinetic friction μk is the same for both vehicles, how do their accelerations a1 and a2 compare?

Although light from the sun appears white, it is actually made up of a lot of different colors. this portion of the electromagnetic spectrum, we call white light is referred to as within the electromagnetic spectrum.

Thomas his older brothers, who own a junk yard, on the weekends to earn extra money. he likes to them push broken-down cars to the back of the junk yard because it makes him feel strong. last saturday, they pushed three cars with different weights, and he noticed he used different amounts of force for each one. the cars were the following weights: white car: 2,700 kg red car: 1,500 kg blue car: 2,100 kg think about how much force is needed to move each car. which correctly lists the cars in order from the most to least amount of force needed to move them? a) white, blue, red b) blue, red, white c) red, white, blue d) white, red, blue

What is the force that opposes motion and works against the downward pull? a) friction b) gravity c) weight d) acceleration