A heavy wheel of radius `20 cm` and weight `10 kg` is to be dragged over a step of height `10 cm`, by a horizontal force `F` applied at the centre of the wheel. The minimum value of `F` is

A wheel of radius r and mass m stands in front of a step of height h . The least horizontal force which should be applied to the axle of the wheel to allow it to raise onto the step is

The minimum horizontal force applied to the centre of wheel of radius R and weight w to pull it over a step of height R//2

The minimum horizontal force applied to the centre of wheel of radius R and weight w to pull it over a step of height R//2

A roller of mass 300kg and of radius 50cm lying on horizontal floor is resting against a step of height 20cm . The minimum horizontal force to be applied on the roller passing through its centre to turn the roller on to the step is

A cuboid of height 10 cm, width 5 cm and 8 kg is kept on a rough horizontal ground as shown . The ground is so rough that we can assume that the questions indicated below. A boy applies a horizontal force F at the top edge of the cuboid. What is the minimum value of F so taht the block begins to topple ?

A uniform cylinder of mass M and radius R is to be pulled over a step of height a (a lt R) by applying a force F at its centre O perpendicular to the plane through the axes of the cylinder on the edge of the step (see figure ) . The minimum value of F required is :