Abicycle and its rider have a combined mass of 80 kg and a speed of 6 m/s. what is the magnitude of the average force needed to bring the bicycle and its rider to a stop in 4 seconds?

Aboxcar traveling at 12 m/s approaches a string of 5 identical boxcars sitting stationary on the track. the moving boxcar collides and links with the stationary cars and they all move off together along the track. what is the final speed of the cars immediately after the collision? (you may take the mass of each boxcar to be 18,537 kg.)

If y gets smaller as x gets bigger and y have an relationship?

Alandscaper is shopping for landscaping materials. she wants to use materials through which water flows easily. which materials should she choose? check all that apply. clay gravel granite rocks with cracks loosely packed soil