Driving at 75m/s, you hit the brakes on your new car, accelerating at a rate of -20m/s. how long will it take the car to come to rest?

How much force must a locomotive exert on a 12840-kg boxcar to make it accelerate forward at 0.490 m/s2?

Select the word from the list that best fits the definition classification of most stars on the h-r diagram

Astone is thrown into a pond. what happens to the amplitude of the resulting waves as they get farther from the point where the stone hit the water? explain.