Newton's First Law of Motion defines the concept of inertia. The law states that an object will remain in its original state of motion until acted upon by an outside force.
Newton's Three Laws of Motion are used to define principles that are fundamental to the field of physics. First presented in 1686, these laws demonstrate the basic concepts that define the motion of all physical objects. The law of inertia contains implications regarding the symmetry of the universe; this can be applied to everything from the most basic movement of simple objects to more advanced concepts such as aerodynamics.Learn More
Ice cubes float in water because ice has a lower density than water. This lower density means that ice weighs less than water in its liquid form.Full Answer >
For a rigid body to be in static equilibrium, without total acceleration, two conditions must be met. First, the vector sum of all forces acting on it must be zero (translational equilibrium). Second, the sum off all torques due to any external force on any axis must be zero (rotational equilibrium).Full Answer >
The reaction force of a flying bird is the upward lift by air it experiences when flapping its wings, according to The Physics Classroom. The reaction force by air is in line with Newton’s third law of motion, which states that every action invokes an equal and opposite reaction.Full Answer >
A rake is third-class lever. The pivot point, called a fulcrum, is at one end, while the load is on the other end. The force is in between. Shovels, spears, elbows and knees are other examples of third-class levers.Full Answer >