A car of mass 800 kg is being driven along a level road. The engine supplies a forward force of 3600 N and the total resistive force is 2000 N.What is the acceleration of the car?
Correct answer: A. 2.0 ms-2
- A. 2.0 ms-2
- B. 2.5 ms-2
- C. 4.5 ms-2
- D. 7.0 ms-2
Explanation
To find the acceleration of the car, we apply Newton's Second Law of Motion, which states that the acceleration is the net force acting on an object divided by its mass (a = F / m). First, calculate the net force by subtracting the resistive force from the forward force: 3600 N - 2000 N = 1600 N. Then, use the formula a = F / m, where F is the net force (1600 N) and m is the mass of the car (800 kg): a = 1600 N / 800 kg = 2.0 ms-2. Therefore, Option A is correct. The other options are incorrect due to errors in calculating the net force or the division step.
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