16.The torque produced by a force depends on i) the magnitude of the force ii) the direction of the force iii) the'point of application of the force relative to origin The correct answer is

17.A rod AB carries three loads of 30 N, 70 N and 100 N at distances of 20 mm, 90 mm and 150 mm respectively from A. Neglecting the weight of the rod, the point at which the rod will balance is

18.If the resultant of two forces has the same magnitude as either of the force, then the angle between the two forces is

19.The angular speed of a car while taking a circular turn of radius 100m at 36 km/hour, is

20.A hoop of radius 3 m weighs 100 kg. It rolls along a horizontal floor so that at its centre of mass has a speed of 200 mm/sec, . The work required to stop the hoop is