ef152-rec-3-4

ef152-rec-3-4 - EF 152 Physics for Engineers Spring, 2009...

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EF 152 – Physics for Engineers Spring, 2009 Recitation 3.4 Review Each table will be assigned one of the following problems. Work out the solution to the problem, and then present it to the class. 1. A True Physics Problem: A true physicist does not like to deal with anything related to reality, but rather just hypothetical problems. We have a hypothetical 0.5 kg mass attached to a spring with stiffness 200 N/m. The mass is released from rest at a displacement of 0.02 m. Determine the velocity and acceleration when the mass has moved halfway back to its equilibrium position. Also find the total energy, kinetic energy, and potential energy at this position. 2. An Alabama Car: The shock absorbers in an old car with mass 1000 kg are completely worn out. When a 980 N person climbs slowly into the car, it deforms 2.8 cm. The car is now towed down the road (with the person inside) to where it will be put on cinder blocks. The car hits a bump, and starts oscillating up and down with an amplitude of 6.3 cm. Determine the maximum velocity and acceleration of the car. 3. The Lump of Clay: A 6 kg block is moving horizontally on a frictionless surface. It is attached to a horizontal spring with stiffness 175 N/m and is moving with simple harmonic motion with an amplitude 0.2 m. At the instant when the block passes through the equilibrium position, a 2 kg lump of clay is dropped
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ef152-rec-3-4 - EF 152 Physics for Engineers Spring, 2009...

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