Georgia Dees: Newton's Second LawThe acceleration of an object is directly proportional to the net force acting upon it. The constant of proportionality is the mass.F=MA A=F/MF = Force = A push or pullM = MassA= Acceleration = speeding up, slowing down or changing direction Mass = 5 kgLet’s assume that the wheels of a 5-kg car apply 10 N of force. What is the net force if friction and drag are negligible? The net force would equal 10 Newtons. What is the acceleration of the car?Force = MA 10= 5A Acceleration =2 m/s2 Mass = 6 kgWhat is the net force if the wheels of the 5-kg car apply 10 Newtons but a 1-kg parachute applies 3 Newtons in the other direction? The net force would equal 3 Newtons. The total mass = 6 kg.What is the acceleration of the car?Acceleration = F/M Acceleration = 3/6 Acceleration =0.5 m/s2 Mass = 10 kgA rocket is added to the car and applies an additional force of 10 Newtons. The wheels still apply 10 N. What is the net force if the parachut! e continues to apply 7 Newtons in the other direction? The total mass of the car, rocket and parachute is 10 kg. The net force would equal 13 Newtons. The total mass = 10 kg.What is the acceleration of the car?Acceleration = F/M Acceleration =13/10 Acceleration =1.3 m/s2i hope this helps you in understanding that why 2nd law is useful in car safety. :)...Show more
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