# Newton's second law of motion

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**Applying Newton's second law**- What is the unbalanced force required to accelerate a 1370 kg car at 4.25 $m/s^{2}$?
- What is the unbalanced force required to bring a 995 kg car travelling at 11.5 m/s to a stop in 30.0 m?
- An apple falls from a tree.
i. What is the force of gravity acting on a falling 0.200 kg apple?

ii. If the apple is accelerated downwards at 9.53 $m/s^{2}$, find the force of air resistance acting on the apple.