Question: The stopping distance of a vehicle is an important safety
The stopping distance of a vehicle is an important safety factor. Assuming a constant braking force, use the work–energy theorem to show that a vehicle’s stopping distance is proportional to the square of its initial speed. If an automobile traveling at is brought to a stop in 50 m, what would be the stopping distance for an initial speed of 90 km/h?
Answer to relevant QuestionsA large car of mass 2m travels at speed v. A small car of mass m travels with a speed 2v. Both skid to a stop with the same coefficient of friction. (a) The small car will have (1) a longer, (2) the same, (3) a shorter ...Six identical books, 4.0 cm thick and each with a mass of 0.80 kg, lie individually on a flat table. How much work would be needed to stack the books one on top of the other? A 0.300-kg ball is thrown vertically upward with an initial speed of 10.0 m/s. If the initial potential energy is taken as zero, find the ball’s kinetic, potential, and mechanical energies (a) At its initial position, ...A skier coasts down a very smooth, 10-m-high slope similar to the one shown in Fig. 5.21. If the speed of the skier on the top of the slope is 5.0 m/s, what is his speed at the bottom of the slope? A hiker plans to swing on a rope across a ravine in the mountains, as illustrated in Fig. 5.35, and to drop when she is just above the far edge. (a) At what horizontal speed should she be moving when she starts to swing? ...
Post your question