3.3 What is the difference between:
(i) Mass and weight
(ii) Action and reaction
(iii) Sliding friction and rolling friction
Answers
Answer:
1.The mass of an object is a measure of the object's inertial property, or the amount of matter it contains. The weight of an object is a measure of the force exerted on the object by gravity, or the force needed to support it.
2.Action force is force acting in one direction. Reaction force is force acting in the opposite direction.
3.Rolling friction takes place when an object rolls on the surface. Sliding friction takes place when two surfaces are rubbed against each other. Rolling friction takes place due to the deformation of surfaces.
Explanation:
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Answer:
mass and weight
The difference between mass and weight is that mass is the amount of matter in a material, while weight is a measure of how the force of gravity acts upon that mass. Mass is the measure of the amount of matter in a body. ... Weight usually is denoted by W. Weight is mass multiplied by the acceleration of gravity (g).
action and reaction
In the third law of motion, the stepping off is called an action. The skateboard responds to that action by traveling some distance in the opposite direction. The skateboard's motion is called a reaction.
Sliding friction and rolling friction
Rolling friction takes place when an object rolls on the surface. Sliding friction takes place when two surfaces are rubbed against each other. Rolling friction takes place due to the deformation of surfaces.
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