2. A force of 18 N is applied to a 4 kg block that is at rest on a level surface. find the acceleration. 3. an 800 kg car is going 15 m/s² along a level highway. how much force is required to stop the car?
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Given:
2. 18 N and 4 kg block that is at rest on a level surface
3. 800 kg car and 15 m/s²
Explanation:
2. According to the Newton's Second Law of Motion
acceleration =
so a = 
3. According to the Newton's Second Law of Motion
force = mass x acceleration so f = 800 kg x 15 m/s²
Answer:
2. 4.5 m/s²
3. 12000 N