Explain how potential energy converts to kinetic energy in the loop-the-loop section of the roller coaster. Make sure to note when the potential energy of the coaster is at its lowest in the loop-the-loop and when the kinetic energy of the coaster is at its highest.

Shafts are machine elements that are used to a) carry axial loads b) direct shear loads c) transmit power d) rotate at constant speed e) none of the above circular and square shafts subjected to the same torque under the same circum behave a) the same way b) almost the same way

For a gate width of 2 m into the paper, determine the force required to hold the gate abc at its location.

Apressure vessel with an r/t 20 cannot be treated as thin walled vessel. a)-trune b)- false