How to find the weight of an object given its mass and the gravitational acceleration.

Suppose:

• mass = m = 4.5 kg
• gravitational acceleration = a_g = 9.8 m/s² (as on Earth)

Calculation:

	The weight of an object equals the mass of the object times the acceleration due to gravity.
	Plug in values. m = 4.5 kg, ag = 9.8 m/s2
	Math completed to significant digits, unit for weight expressed with fundamental units.
	Unit for weight expressed as Newtons.

Notes:

• 1 N (Newton) is defined as 1 kg-m/s² (kilogram-meter per second squared)