Question

6. The displacement x of a particle moving along a
straight line at time t is given by x = -(t-1)^2 + 2(2-t)^2.
The acceleration of the particle is:
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Answer 1

Answer: 2 m/s^2

Explanation: velocity v= dx/dt

v= -2 (t-1) - 4 (2-t)

acceleration a = dv/dt

a = -2+4 = 2 m/s^2