Suppose you are driving a car at a high speed. Why should youavoid slamming on your brakes when you want to stop in theshortest possible distance? (Newer cars have antilock brakesthat avoid this problem.)

A body weighing 2 kg was acted upon by a horizontal force of 3 N. What speed will the body acquire in 5 s in the absence of friction?

The harder you hit the brakes while driving forward, the more the front end of your car will move down (and the rear end move up). Why? What happens when cars accelerate forward? Why do drag racers not use front-wheel drive only?

Same question just asking two different things

A 70 kg runner has a vertical acceleration ay of 13.5 m/s2, the vertical reaction force Ry that caused this acceleration is: