1. Why do we categorise magnetic force and
gravitational forces as non-contact forces?
2. Every object attracts another object in the
universe. Why are you not pulled towards the
objects around you?
3. What are the different effects of force? Give
suitable examples.
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Answers
Answer:
1.
A non-contact force is a force which acts on an object without coming physically in contact with it. The most familiar non-contact force is gravity, which confers weight. In contrast a contact force is a force which acts on an object coming physically in contact with it.
2.Every object in the Universe is being attracted towards every other object by the force of gravity. This means that there is nowhere you can go in the Universe where gravity is not acting. Examples of gravity in action: Gravity holds the atmosphere in place around the Earth.
Answer:
1. A non-contact force is a force which acts on an object without coming physically in contact with it. The most familiar non-contact force is gravity, which confers weight. In contrast a contact force is a force which acts on an object coming physically in contact with it.
2. Every object in the Universe is being attracted towards every other object by the force of gravity. This means that there is nowhere you can go in the Universe where gravity is not acting. Examples of gravity in action: Gravity holds the atmosphere in place around the Earth.
3. 1) Can change the state of an object(rest to motion/ motion to rest):For example, pushing a heavy stone in order to move it. 2) May change the speed of an object if it is already moving. For example,catching a ball hit by a batsman. 3) May change the direction of motion of an object.