Which vehicle has an acceleration of 5 m/s2?
Correct answer: D. A motorbike, when its speed changes from rest to 50 m/s in 10 s
- A. A bicycle, when its speed changes from rest to 2.5 m/s in 2 s
- B. A car, when its speed changes from rest to 15 m/s in 5 s
- C. A lorry, when its speed changes from rest to 20 m/s in 15 s
- D. A motorbike, when its speed changes from rest to 50 m/s in 10 s
Explanation
The acceleration of a vehicle is calculated using the formula: Acceleration = (Final Velocity - Initial Velocity) / Time. For the motorbike, it changes speed from 0 m/s to 50 m/s in 10 seconds, resulting in an acceleration of 5 m/s2, which matches the required value. Therefore, option D is correct. The other options do not provide the required acceleration of 5 m/s2, as their calculated accelerations are 1.25 m/s2, 3 m/s2, and 1.33 m/s2 for the bicycle, car, and lorry, respectively.
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