Q. At rest, a car's horn sounds at a frequency of 385 Hz. The horn is sounded while the car is moving down the street. A bicyclist moving in the same direction with one-third the car's speed hears a frequency of 342 Hz. What is the speed of the car? (Take the speed of sound in air to be 345 m/s.)

Q. A 10.0 kg monkey climbs a uniform ladder with weight 1.20X10^2N and length L= 3.00m. The ladder rests against the wall and makes an angle of 60 degrees with the ground. The upper and lower ends of the ladder rest on frictionless surfaces. The lower end is connected to the wall by a horizontal rope that is frayed and can support a maximum tension of only 80N. Find the normal force exerted on the bottom of the ladder. b) find the tension in the rope when the monkey is 2/3 of the way up the ladder. c) find the maximum distance that the monkey can climb up the ladder before the rope breaks.