Q. An 83 kg skier is sliding down a ski slope at a constant velocity. The slope makes an angle of 16° above the horizontal direction.
Neglecting any air resistance, what is the force of kinetic friction acting on the skier?
Q. A person driving her car at 55 km/h approaches an intersection just as the traffic light turns yellow. She knows that the yellow light lasts only 2.0 s before turning to red, and she is 30 m away from the near side of the intersection. The intersection is 15 m wide. Her car's maximum deceleration is -7.0 m/s2, whereas it can accelerate from 55 km/h to 70 km/h in 4.5 s. Ignore the length of her car and her reaction time.