Created by StemPy LabA uniform disc of mass and radius can turn freely about a fixed horizontal axle through its centre. A light string wound round it is pulled with a steady force of , starting from rest. After , the angular velocity of the disc and the length of string pulled off are
← All Quizzes
← A small ball moves at 10 m/s straight towards a very heavy wall, which is itself moving towards the ball at 2 m/s. The collision is perfectly elastic. The speed of the ball after it bounces off isA satellite of mass m is to be launched from the surface of the Earth (radius R) into a circular orbit at a height R above the surface. Ignore the Earth's spin and air resistance, and let g be the acceleration due to gravity at the surface. The least energy that must be given to the satellite is →
Discussion (0)
Log in to join the discussion.
Loading…