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.
Know MoreA pound-mass needs to be distinguished from pound-force because they are not equivalent units. A pound-mass refers to how much mass an object possesses; in the case of the dumbbell, it is a 50-pound-mass object. A pound-force is the unit of force that an object is acted upon. In the example given, lifting a 50-pound-mass weight requires 1,608.7 pounds-force away from the surface of the Earth.
Learn more about Motion & MechanicsForce and mass are related by their opposite influence on acceleration: Force increases acceleration, whereas mass causes acceleration to decrease. Mass is a measure of resistance to acceleration and force is an interaction that causes acceleration, according to The Physics Hypertextbook. Both represent scientific entities acting on the rate of change in velocity of an object, defined as acceleration.
Full Answer >G-force is an attractive force caused by the acceleration due to gravity on one object by another object. Positive g-force increases the apparent weight of a body while negative g-force decreases the apparent weight of a body.
Full Answer >Newton’s second law states that the force acting on an object is directly related to the acceleration. The law is formulated as F = m x a, where F = force, a = acceleration and m = mass of the object in motion. In terms of Atwood’s machine, a force equal to the difference in the suspended weights accelerates the total mass, m1+ m2.
Full Answer >When force is applied evenly, an average of 53 pounds of force is required to crack an egg when it is standing up on its end. It takes 90 pounds of force to crack an egg on its side in the same circumstances.
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