3. A 1,200 kg car traveling at 10 m/s hits a treeand is brought to rest in 0.10

Question

3. A 1,200 kg car traveling at 10 m/s hits a treeand is brought to rest in 0.10 seconds. What is the magnitude ofthe average force acting on the car to bring it to rest?: *

1.2× 102 N

1.2× 103 N

1.2× 104 N

1.2× 105 N

Please respond to the question above.

3. A 1,200 kg car traveling at 10 m/s hits a treeand is brought to rest in 0.10 seconds. What is the magnitude ofthe average force acting on the car to bring it to rest?: *

1.2× 102 N

1.2× 103 N

1.2× 104 N

1.2× 105 N

Please respond to the question above.

Explanation / Answer

   acceleration   a   =   (finalvelocity - initial velocity) /time   =   (0 - 10) /0.10   =  - 100 m/s2

   - ve sign can be discarded as itindicatesdeacceleration.
        Force   F   =   mass* a   =   1200 *100   =   1.2 *105   N    Force   F   =   mass* a   =   1200 *100   =   1.2 *105   N

Related Questions

Navigate

• Browse (All)
• Browse 3
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.