Quantify Forces (the numbers) And you!

Forces = masses X acceleration Newtons = kg x m/s2

Example: What Force is required to accelerate a 0 Example: What Force is required to accelerate a 0.032 kg object at a rate of 2.1 m/s2 ? F = m X a ? = 0.032 kg X 2.1 m/s2 F = 0.067 Newtons of force!!!

What force do I apply to the floor if I have a mass of 88 kg? F = m X a F = 88 kg X 9.8 m/s2 F = 862.4 N of force ****** This is my Weight!!! Notice the difference between. Mass and weight 88 kg 862.4 N Mass is a measure of inertia. Weight depends on the rate of gravitational acceleration!

How much force does the egg experience? Height = 4 m Mass of egg = 53 grams Gravitational acceleration (NOT De-acceleration value) = 9.8 m/s2 Time for egg to come to stop (after fall) = 0.02 seconds (2/100ths of a second) 1) Calculate how fast the egg is falling when it lands (Vf) 2) Calculate the rate of de-acceleration 3) Calculate the Force on the falling egg

1). Calculation of Vf of the egg as it falls just prior to impact Vf2 = VO2 + 2ax. VO = 0 Therefore: Vf2 = 2ax. Therefore: Vf. = 2 (9.8)(4) = Vf = 8.85 m/s

2) Calculate the rate of de-acceleration a = ____V = Vf - Vo = 0 - 8.85 = time t .02 De-acceleration rate = 442.5 m/s2

3) Calculate the Force on the egg Knowing the mass of the egg and the rate of de-acceleration F = m x a F = 0.053 kg x 442.5 m/s2 = F = 23.45 N of force

How many pounds of force is that 23.45 N? If 1N of force = 0.22 lbs. of force? 23.45 N ( 0.22 lbs.) = 5.159 lbs of force 1N