Rest - When position of body does not change with respect to its surrounding, it is said to be at, Motion - When position of body changes with respect to its surroundings, it is said to be in, Stretch - When a force increases the length of a body, Squeeze - When a force decreases the length of a body, Muscular - Force applied by muscles of human or animal body, Non Contact - When force is exerted without actual physical contact, Newton - SI Unit of Force, Gravity - Pull of earth on a body, Friction - Force which opposes motion, Tension - Force which acts on the body upwards when it is suspended on a string,

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