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.
Found an issue with this question?
Related Questions
More from Kinematics
A ball is thrown vertically downward with a velocity of 20 m/s from the top of a tower. It hits the ground after some time with a velocity of 80 m/s. ...
A particle has initial velocity (3î + 4ĵ) and has acceleration (0.4î + 0.3ĵ). Its speed after 10 s is
A ball is dropped from a height h at t = 0 starting from rest. After 6 seconds another ball is thrown downwards from the same platform with a speed v....
More from 2017
Which of the following statements are correct? (A) Centre of mass of a body always coincides with the centre of gravity of the body. (B) Centre of m...
With reference to factors affecting the rate of photosynthesis, which of the following statements is NOT correct?
Which of the following options gives the CORRECT sequence of events during mitosis?