The concept of explains the force that attracts two bodies towards each other. This force is why objects fall to the ground when dropped, and it is proportional to the mass of the objects involved. The formula for calculating gravitational force is given by , where F is the force of gravity, G is the gravitational constant, m1 and m2 are the masses of the two objects, and r is the distance between their centers.
In addition to gravity, the concept of plays a key role in the motion of objects. Friction is a force that opposes the relative motion of two surfaces in contact. There are different types of friction, such as static friction, which prevents an object from starting to move, and kinetic friction, which acts on an object that is already in motion. The coefficient of is a dimensionless number that represents the ratio of the force of friction between two bodies to the force pressing them together.
Understanding the laws of is essential in physics. Newton's three laws of motion describe the relationship between a body and the forces acting upon it, and its motion in response to those forces. The first law states that an object at rest will remain at rest, while an object in motion will continue moving at a constant unless acted upon by a net external force. The second law establishes that the acceleration of an object is dependent on the net force acting upon it and its mass, summarized by the equation . The third law states that for every action, there is an equal and opposite reaction.
Keywords
friction | velocity | motion | f = g(m1*m2)/r^2 | friction | f = ma | gravity |
