Newton’s second law of motion: Newton’s second law of motion states that the force F on an object is the product of its mass m with its acceleration a: F = ma . If mass is measured in kilograms and...

Newton’s second law of motion: Newton’s second law of motion states that the force F on an object is the product of its mass m with its acceleration a:

F = ma .

If mass is measured in kilograms and acceleration in meters per second per second, then the force is given in newtons. Another way to measure force is in pounds; in fact, 1 newton is 0.225 pound (which is about a quarter of a pound). In the case of an object near the surface of the Earth, the force due to gravity is its weight. Near the surface of the Earth, acceleration due to gravity is 9.8 meters per second per second. What is the weight in newtons of a man with a mass of 75 kilograms? What is his weight in pounds?