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प्रश्न
When an object is at rest on the inclined rough surface, ______
विकल्प
static and kinetic frictions acting on the object is zero
static friction is zero but kinetic friction is not zero
static friction is not zero and kinetic friction is zero
static and kinetic frictions are not zero
उत्तर
When an object is at rest on the inclined rough surface, static friction is not zero and kinetic friction is zero.
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