1. A 1400 kg car carrying four 87 kg people travels over a \"washboard\" dirt ro

Question

1. A 1400 kg car carrying four 87 kg people travels over a "washboard" dirt road with corrugations 3.4 m apart. The car bounces with maximum amplitude when its speed is 18 km/h. When the car stops, and the people get out, by how much does the car body rise on its suspension?

2. The suspension system of a 2100 kg automobile "sags" 7.3 cm when the chassis is placed on it. Also, the oscillation amplitude decreases by 42% each cycle. Estimate the values of (a) the spring constant k and (b) the damping constant b for the spring and shock absorber system of one wheel, assuming each wheel supports 525 kg.

3. A physical pendulum consists of 1.6 m long sticks joined together as shown in the figure. What is the pendulum's period of oscillation about a pin inserted through point A at the center of the horizontal stick?

Explanation / Answer

2.

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