A particle moving with a constant acceleration has a velocity of 20 cm/s when its position is x = 10 cm.Its position 7.0 s later is x = -30 cm.What is the acceleration of the particle? A)-7.3 cm/s² B)-8.9 cm/s² C)-11 cm/s² D)-15 cm/s² E)-13 cm/s²

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Quizplus · Accepted Answer

Explanation:The equation of motion is:v = u + atwhere v is the final velocity, u is the initial velocity, a is the acceleration, and t is the time.We are given that v = 20 cm/s, u = 0 cm/s (since the particle starts from rest), t = 7.0 s, and x = 30 cm.We can use the equation of motion to find the acceleration:a = (v - u) / t= (20 cm/s - 0 cm/s) / 7.0 s= 2.86 cm/s^2Therefore, the acceleration of the particle is 2.86 cm/s^2.

A Particle Moving with a Constant Acceleration Has a Velocity