An object starts from rest and accelerates uniformly in a straight line in the positive x direction. After 11 seconds, its speed is 70.0 m/s.
-Determine the acceleration of the object.

Question

Quizplus · Accepted Answer

We can use the following kinematic equation:

v = u + at

where v is the final velocity (70.0 m/s), u is the initial velocity (0 m/s), a is the acceleration (unknown), and t is the time interval (11 s).

Rearranging the equation, we get:

a = (v - u) / t = 70.0 m/s / 11 s ≈ 6.4 m/s^2

Therefore, the acceleration of the object is approximately 6.4 m/s^2 in the positive x direction. The correct answer is B.

An Object Starts from Rest and Accelerates Uniformly in a Straight