Name the kind of force which acts on a football rolling down on a football ground.
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Solution
When a football rolls down on a football ground, the surface irregularities of the football and the ground come into action.
The surface irregularities try to lock each other which causes friction between the football and the ground surface.
When the football rolls on a football ground, there exists a force of friction between the football and the ground which tries to hinder the motion of the football.
Hence, a frictional force acts on the football rolling down on a football ground.