NEET 2017 Physics Acceleration MCQ Question
The x and y co-ordinates of the particle at any time are x = 5t – 2t² and y = 10t respectively, where x and y are in metres and t in seconds. The acceleration of the particle at t = 2s is:
0
5 m/s²
4 m/s²
8 m/s²
Correct Answer
Detailed Explanation
The acceleration is the second derivative of position with respect to time. For x: a_x = d²x/dt² = -4 m/s². For y: a_y = d²y/dt² = 0. The resultant acceleration is √(a_x² + a_y²) = 4 m/s².
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