Practice Questions
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When a block of wood is resting on a concrete surface, which factor primarily influences the maximum static friction that can be exerted before the block starts to slide?
Static friction is the force that keeps an object from moving. Other options are incorrect because Some think the floor’s color changes friction, but ...
When considering the friction between a rubber tire and a wet asphalt road, which material property is most likely to increase the friction coefficient compared to rubber on dry asphalt?
When the road is wet, tiny water films form, but the roughness of the pavement still lets the tire’s rubber press into the bumps. Other options are in...
A block of metal is placed on an inclined plane with a surface roughness that is significantly higher than that of the plane's opposing surface. If the angle of incline is 30 degrees, what effect does this combination of surface roughness and angle have on the maximum static friction experienced by the block?
The block sits on a rough surface, so the static friction coefficient (µs) is high. Other options are incorrect because It assumes the angle alone low...
When a smooth metal block is placed on a rough surface, how does the surface roughness affect the normal force required to maintain static equilibrium before the block begins to slide?
Rougher surfaces have more bumps that press together. Other options are incorrect because Some think rougher surfaces mean the block is easier to hold...
How does increasing the angle of incline of a ramp affect the normal force acting on an object resting on it?
The weight of the object pushes downwards. Other options are incorrect because Some think the tilt does not change the perpendicular push; It might se...
Frictional Force:Normal Force :: Applied Force:?
When you push a box, the friction you feel comes from how hard the box presses on the floor. Other options are incorrect because Acceleration is a res...
You are analyzing a scenario where two blocks are placed on a surface, Block A has a mass of 5 kg and Block B has a mass of 0.4 kg. Both blocks experience different frictional forces against the same surface. Classify the following statements into correct categories regarding their friction coefficients: 1) The friction coefficient of Block A is greater than that of Block B. 2) The frictional force on Block B can be considered negligible compared to Block A. 3) The friction coefficient depends solely on the mass of the block. 4) The surface material affects the friction coefficient regardless of mass. Which statements belong to the category of 'Correct Understanding of Friction Coefficients'?
Statement 2 is correct because friction force equals the coefficient multiplied by the normal force, so a lighter block has a smaller friction force a...
The friction coefficient is defined as the ratio of the frictional force to the ______ acting on an object.
The friction coefficient is the fraction of the frictional force compared to the normal force. Other options are incorrect because Some students think...
If the friction coefficient between two surfaces is 0.3, what does this imply about the forces involved?
The coefficient tells us how much friction is compared to the force pressing the surfaces together. Other options are incorrect because People sometim...
If the frictional force between two surfaces is insufficient to prevent motion despite an increase in the normal force, what is the underlying cause of this failure in maintaining equilibrium?
The friction coefficient is too low. Other options are incorrect because Some people think a bigger contact area makes friction larger; Heavy objects ...
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