Answer Happy

Topic 6 - What makes a car stop? Part 1) "Crumple zones" are specific areas on the front of cars that become important during car collisions. What role do crumple zones play in car crashes? (No answer given) Part 2) Tow ropes are very common on ski slopes and allow skiers and snowboarders to return to the top of a ski slope once they have reached the bottom. The way a tow ropes operates is skiers at the bottom of a slope hold onto handles attached to the tow rope, which pulls them back up the slope.

Figure 1. Tow rope on a ski slope. A typical skier, who weighs 78.3 kg, is holding onto the tow rope while on a slope that is inclined at 28.2°. If a maximum force of 457 N is applied to them before they start to move, what is the coefficient of static friction between the skis and the snow? us Part 3) Once the skier is at the top of the slope (where the ground is flat), they let go of the tow rope and let friction bring them to a stop. If they were initially travelling at 1.50 m/s when they let go of the rope and travelled 2.93 m before coming to a stop, what is the coefficient of kinetic friction between the skis and the snow? uk =