Question

Phys I final exam 2018 Student: l. A ceiling fan is rotating in counterclockwise direction (as viewed from below), but it is slowing down. What are the directions of ω and E? 2. Using momentum and force principles, explain why an air bag reduces injury in an automobile collision. 3. An object is oscillaing in SHM with amplitude of 2.5 cm and a period of 0,02 s. (a) Find the values of its velocity and acceleration when its displacement from the equilibrium position is 1 em, (b) if the mass of the object is 20 g, what will be the restoring force, acting on the object at this position? (c) what is the cyelic frequency of the object? 4. A gas expands at constant pressure from 5 m2 at 15 °C until the volume is 10 m2. What is the final temperature of the gas? 5. A 0.01 kg test charge of +2x10 C is located 8 em to the right of a charge of +1x10% C and 11 cm to the left of a charge of -6x10 C. The three charges lie on a straight line. (a) Find the force on the test charge. (b) Find the intensity and the potential of electric field at this point. (c) If the test charge is free, with what acceleration it will start the motion?

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Answer 1

Only first four can be answered according to HOMEWORKLIB RULES upload other questions separately

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