Exam-style question
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If a car of mass 1000 kg accelerates from rest to a speed of 20 m/s in 10 seconds, what is the average force applied to the car?.
- A.2000 N
- B.1000 N
- C.500 N
- D.4000 N
Model answer
What a good answer should say
- 2000 N.
- the correct option
Explanation
Why this works
The correct answer is 2000 N. This supports State and apply Newton's three laws of motion.
in Newton's laws of motion because it uses the required mechanics relationship directly. The other options are less suitable because they confuse a different force, motion, energy, momentum, or materials concept.
Common mistake
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