Q2. Two spheres weighing 100 kN and 150 KN are connected by a flexible string and rest on two mutually perpendicular planes PQ and QR. Find tension in the string which passes freely through slots in smooth inclined planes PQ and QR.​

Apackage of supplies is dropped from a plane, and one second later a second package is dropped. neglecting air resistance, the relative velocity of the 1st package viewed from the second will 56) a) increase. b) be constant. c) be zero. d) depend upon their weight. e) decrease

Africtionless piston-cylinder contains 50 l of saturated liquid r-134a. the piston has a mass and an area resulting in an applied pressure of 500 kpa on the refrigerant. the refrigerant is now heated until its temperature rises to 70∘c. calculate the work (in kj) done during this process.

Coal contains energy. a. light b. kinetic c. chemical d. mechanical