John took 45 minutes to bicycle to his Grandmother’s house, a total of four kilometers. What was his velocity in km/hr?

15. one purpose of the tread pattern on a tire is to a reduce tire wear. b. reduce traction c. allow water to flow away from the tire. d. look impressive.

Alfred pushes on a heavy box, but cannot move it. the box has a lot of inertia motion friction gravity

Select all of the following that are equal to an impulse of 20 unitsa) force= 5, time= 5.5b) force= 25, time= 0.8c) force= 0.1, time= 200d) force= 10, time= 2(its b, c, and d)(also in order to find answer they have to add to get the unit)ex= 25x.8=20 or .1x200=20