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# 6 Newtons Second Law

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### 6 Newtons Second Law

1. 1. Newton's 2nd Law
2. 2. Newton's second law (the law of acceleration) The acceleration of an object depends on the mass of the object and the amount of force applied.
3. 3. <ul><li>Newton's second law </li></ul><ul><li>Mass - the acceleration decreases as mass increases (see fig 4 pg 47) </li></ul><ul><li>Force - acceleration increases as force increases. (see fig 4 pg 47) </li></ul>
4. 4. Newton's 2nd Law Force= mass x acceleration OR F= ma m=F/a a=F/m
5. 5. Mike's car, which has a mass of 1,000 kg, is out of gas. Mike is trying to push the car to a gas station, and he makes the car go 0.05 m/sec 2 . Using Newton's Second Law, compute how much force Mike is applying to the car.
6. 6. Force= mass x acceleration Or F= ma Mass=1000 kg Acceleration= 0.05 m/sec 2
7. 7. F= ma F= (1,000 kg) x 0.05 m/sec 2 F= 50 kg . m/sec 2 or F= 50 N (1 Newton= kg x m/sec 2)
8. 8. <ul><li>Open to page 48 </li></ul><ul><li>Complete 1-3 </li></ul><ul><li>9.8 m/sec 2 </li></ul><ul><li>50,000 N </li></ul><ul><li>3) 350 N </li></ul>