Q. A 15.00 m long conveyor belt, inclined at 27.0°, is used to transport bundles of newspapers from the mail room up to the cargo bay to be loaded on delivery trucks. Each newspaper has a mass of 1 kg and there are 27 newspapers per bundle. Find out useful power of the conveyor if it delivers 13 bundles per minute.
Q. A model rocket is launched straight upward with the initial speed of 70m/s. It accelerates with a constant upward acceleration of 3 m/s2 until its engines stop at an altitude of 180 m.