According to Newton’s second law of motion, force is equal to mass times acceleration, meaning that mass and acceleration are inversely proportional. A constant force applied to two bodies of different masses leads to higher acceleration in the less massive body than in the more massive one.
Acceleration is the rate of change of velocity of an object due to a net force. This net force is the resultant force of all forces acting on the body at any given instant. The larger the magnitude of this net force, the larger the acceleration of the body. One of the definitions of mass is the resistance of a body to motion in general and acceleration in particular due to the application of force. The more massive a body is, the less it accelerates due to the application of force.
The concept of resistance to acceleration is closely tied to Newton’s first law and inertia, the tendency of a body to resist any change in its state of motion. The mass in Newton’s second law is often called the inertial mass, because it defines this tendency of a body to resist changes in motion. Moving a body from rest or stopping a moving body must always be accompanied by acceleration or deceleration regardless of how gradual or abrupt the change in motion.Learn More
A 50 pound-mass dumbbell is pulled downward by the Earth's gravitational field at an acceleration of 32.174 feet-pound-mass per second squared, so the force to lift it is 1,608.7 pounds-force. Newton's second law of motion states that force is equal to mass multiplied by acceleration, gravitational or otherwise.Full Answer >
The weight of a toy cart does not affect its acceleration going down a ramp. This counterintuitive fact demonstrates the relationship between gravitational force and mass.Full Answer >
G-force refers to the force of gravity, equal to a value of 1 for a body at rest at sea level, but which can be increased significantly through vertical or horizontal acceleration. An example of g-force increasing through acceleration is the effect felt by riders on a roller coaster during its downward plunge. The amount of accelerated g-force that a human body can endure is limited, and at levels beginning between 9 and 18 g, it can cause a loss of consciousness.Full Answer >
The magnitude of frictional force is equal to the magnitude of the normal force multiplied by a frictional coefficient. The normal force is proportional to the force of gravity and is the ground pushing back up against an object. The frictional coefficient depends on the surface properties of the objects.Full Answer >