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Answers
Answer:
1. force :- A force is a push or pull upon an object resulting from the object's interaction with another object. Whenever there is an interaction between two objects, there is a force upon each of the objects.
2. force comes into play when it is pushed or pulled. force is push & pull it come not only playing,eg : when v throw ball & stop it . it is not important for a body to be in contact.
3.a. the box will move forward in direction where it is pushing
b. it's said so they are equal in magnitude then if a person push 5N from left and 5N from right they will not move at all
4.a) If two(or more) forces act on an object in the same direction, the net force is the sum of the forces
b) When two forces are applied in the opposition direction on an object, the net force will be the difference between the two forces.
5.i) Friction
ii) The force of friction opposes the motion of an object, causing moving objects to lose energy and slow down
iii) kinetic force of friction
6.A force acting on an object causes the object to change its shape or size, to start moving, to stop moving, to accelerate or decelerate. When there's the interaction between two objects they exert a force on each other, these exerted forces are equal in size but opposite in direction.
7. drag and spring force
8. electrostatic , gravitational , magnetic force
9a. The electrostatic force is an attractive and repulsive force between particles are caused due to their electric charges. The electric force between stationary charged body is conventionally known as the electrostatic force. It is also referred to as Columb's force.
b. When two objects are gravitational locked, their gravitational force is centered in an area that is not at the center of either object, but at the barycenter of the system. The principle is similar to that of a see-saw.
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Explanation:
1.A force is a push or pull upon an object resulting from the object's interaction with another object. Whenever there is an interaction between two objects, there is a force upon each of the objects.
2.force comes into play when it is pushed or pulled. force is push & pull it come not only playing,eg : when v throw ball & stop it . it is not important for a body to be in contact.
3.1)If the two forces applied to an object act in the same direction ,then the resultant force acting on the object is equal to the sum of two forces: When two forces act in the same direction their effective magnitude increases. ... And this bigger force can move the heavy object very easily.
2)Balanced force are forces equal in magnitude and opposite in direction ,they acts on the same body but resultant of these forces is zero, hence cannot produce any effect of motion.
6.A force acting on an object causes the object to change its shape or size, to start moving, to stop moving, to accelerate or decelerate. When there's the interaction between two objects they exert a force on each other, these exerted forces are equal in size but opposite in direction.
7.Reaction force. An object at rest on a surface experiences reaction force . ...
Tension. An object that is being stretched experiences a tension force. ...
8.An apple falling down from a tree is one of the best examples of non-contact force.
Falling of raindrops on earth is also an example of non-contact force.
9.a)Electrostatics is a branch of physics that studies electric charges at rest. Since classical physics, it has been known that some materials, such as amber, attract lightweight particles after rubbing. The Greek word for amber, ήλεκτρον, or electron, was thus the source of the word 'electricity'.
b)Gravity, or gravitation, is a natural phenomenon by which all things with mass or energy—including planets, stars, galaxies, and even light—are brought toward one another. On Earth, gravity gives weight to physical objects, and the Moon's gravity causes the ocean tides.