SUBJECT:MECHANICAL ENGINEERING Q1: A 10 kg body falls from rest with negligible interaction with its surroundings (no friction). Determine its velocity after it falls 3.8 m. Use the 1st Law of Thermo to solve this problem. You may use your knowledge of kinematics or dynamics to verify your solution but the solution must be derived from the 1st Law equation. Ans. 8.64 m/s (Is it ∆ U=-W ? Show your work)

show each step for answer

Data has been gathered from a lifting system used to remove spent RBMK fuel rods from the spent rod pool into long term safe storage. At present the spent rods are winched up from the pool and then lowered into concrete barrels in a second pool.  When it is positioned properly the winch is released and the rod is allowed to drop in.  The following calculation is based on data gathered from the present set up. Time taken to lowered into concrete barrels = 10 Seconds Winch drum diameter = 0.9m Mass of load = 185 kg Initial velocity = 0 m/s Distance travelled = 6m You have been asked to use this information to determine: The final linear velocity of the load The linear acceleration of the load The final angular velocity of the drum The angular acceleration of the drum The tension force in the cable The torque applied to the drum   In determining the above quantities, you should clearly state the formulae used and apply dimensional analysis techniques to show that all values/units used…

A hammer has a speed of 8.0 m/s just before it strikes a 0.015 kg iron nail horizontally, using its 1.2 kg head. Assuming the nail absorbs all of the energy from the hammer, how much would the temperature of the nail rise if the hammer hit the nail 8 times in quick succession? Enter your answer in either K or °C. (Since it's a change in temperature, these units are identical.) J kg.K The heat capacity of iron is 450-