Question

2. cm then released. A50 gram mass at rest stretches a spring by 2.5 cm. The spring is further stretched by 1.4 a) b) Assuming simple harmonic motion (with no drag), what is the frequency of the spring? If the drag coefficient r was 10 Hz, what is the frequency of the spring? If the frequency of the spring is 3 Hz, what is the drag coefficient r? c) Note: The units of the coefficient of resistance 2mr are force units, so the units of r end up being Hz, or 1/sec 3. A shock absorber spring on a heavy duty truck is 2 1/, feet long. When installed, the spring compresses to 2 feet. The truck weighs 7 200 lbs, so each shock absorber has a load of 1,800 lbs. Treat the compression of the spring the same as if 1800 lbs would stretch it by 6 inches) What is the spring constant? b What is the coefficient of resistance that would cause the spring to be critically damped? 4. A simple pendulum of length 3 feet long is given an initial angular velocity of 15'/sec away from the vertical from the position of 5 a) Find the equation of motion. b) What is the amplitude? c What is the period of the pendulum? d) What is the angular velocity as it crosses the vertical (equilibrium) position?

Answer 1

Answ! Given that 2.SX 1o2- a) 50 0 due to drag. лль.ao Aeent due to & CT . b 0.096