bhebert4130
28.11.2019 •
Physics
Ahockey puck is at rest on a flat surface. then one end of the surface is lifted gradually, forming an inclined plane of increasing slope. by measuring the angle of the slope at which the puck begins to slide, what quantity can be calculated?
the coefficient of kinetic friction between the puck and the surface
the mass of the puck
the volume of the puck
the coefficient of static friction between the puck and the surface
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Ответ:
the coefficient of static friction between the puck and the surface
Explanation:
As per the FBD we can say that as we increase the angle of the inclination the component of force of gravity will counterbalance the friction force
At the condition of just equilibrium when it is just begin to slide then in that case we can say
so here for finding frictional force maximum value we can say
here for finding Normal force we can write force balance normal to the inclined plane
now from above equations
so angle depends on the coefficient of static friction
Ответ:
The law of conservation of mass states that mass in an isolated system is neither created nor destroyed by chemical reactions or physical transformations. According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants.
Explanation: