![]() So the distance between deer and car at stopping is 37 m - 20 m = 17 m. We know you reaction time is 0.50 s, and the car travels a distance of (20 m/s)(0.5 s) = 10 m in that time, leaving a distance of 47 m - 10 m = 37 m to the deer when you start braking.Īssuming your car decelerates at 10 m/s², the distance it takes to brake can be found using one of the kinematic equations: This can easily be solved using one of the kinematic equations of motion. how much distance is between you and the deer when you come to a stop? Your reaction time before stepping on the brakes is 0.50 s, and the maximum deceleration of your car is 10 m/s2. #1 You're driving down the highway late one night at 20 m/s when a deer steps onto the road 47 m in front of you. If the fastest you can safely drive is 65 mi/h, what is the longest time you can stop for dinner if you must travel 541 mi in 9.6h total? If the fastest you can safely drive is 65 mi/h what is the longest time you can stop for dinner if you must travel 541 mi in 9.6h total? Properly adjusting your headrest reduces injuries due to whiplash.ġ. If your vehicle is hit from behind while stopped, your head tends to stay in place due to inertia, while the rest of your body is pushed forward by the seat. Properly adjusting your headrest can reduce injury due to whiplash. When you're stopped and hit from behind, your head tends to stay in place due to inertia while the rest of your body is pushed forward by the seat. You may be injured because of the inertia and momentum of loose objects in your car which can fly through the air during a sudden stop. Inertia also causes your body and loose objects in the car to keep moving forward if your vehicle comes to a sudden stop. ![]() While driving, inertia keeps your vehicle moving unless the vehicle is acted upon by something, such as your brakes, the road surface, a fixed object (such as a tree), or another vehicle. Safety belts work against inertia to keep you from being thrown forwardĪn object in motion, remains in motion, in a straight line, at a constant speed, until acted upon by an unbalanced force, is what keeps a car going straight down the highway, with minimal steering effort. If you are going right into a curve, Inertia will pull your vehicle to the center of the road, or possibly into an oncoming traffic lane. For example, when you're waiting for a green light on flat pavement at an intersection, your vehicle won't move unless you engage the engine or are otherwise pushed. This is called the law of inertia and it applies to driving. Objects that are moving tend to continue moving, while objects that aren't moving tend to remain at rest unless they're acted upon by some other force.
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