Contact Forces
A. Define the following:
1. Contact force:
2. Muscular force:
3. Friction:
Answers
1.Acontact force is any force that requires contact to occur. Contact forces are ubiquitous and are responsible for most visible interactions between macroscopic collections of matter. Pushing a car up a hill or kicking a ball across a room are some of the everyday examples where contact forces are at work.
2.The force exerted by the muscles of the body is called muscular force . The human beings exert muscular force for performing the various activities like walking, jumping, running, climbing, lifting pushing, pulling ,stretching, squeezing, twisting and pressing the objects.
3.Friction is a force between two surfaces that are sliding, or trying to slide, across each other. For example, when you try to push a book along the floor, friction makes this difficult. Friction always works in the direction opposite to the direction in which the object is moving, or trying to move.
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Answer:
A contact force is any force that requires contact to occur. Contact forces are ubiquitous and are responsible for most visible interactions between macroscopic collections of matter.
The force exerted by the muscles of the body is called muscular force . The human beings exert muscular force for performing the various activities like walking, jumping, running, climbing, lifting pushing, pulling ,stretching, squeezing, twisting and pressing the objects.
Friction is a force between two surfaces that are sliding, or trying to slide, across each other. For example, when you try to push a book along the floor, friction makes this difficult. Friction always works in the direction opposite to the direction in which the object is moving, or trying to move.