Barron's 2nd Edition PT1 Q17

Barron's Book

17) This problem requires us to identify and use the respective kinematic equations.

Where d is displacement, v[o] is initial velocity, v[f] is final velocity, t is time, a is acceleration, and t is time

We are given the initial velocity, the acceleration, and the time. In order to find the displacement, we should use equation 1 because it has all of these variables. Likewise, we should use equation 2 to find the final speed.

Starting with the displacement, we need to plug in our values. It is crucial to keep in mind that "initially at rest" it means v[o] = 0.

Where d is displacement, v[o] is initial velocity, v[f] is final velocity, t is time, a is acceleration, and t is time

Displacement: 10 meters

The last step is to solve for the final velocity. As previously explained, we will use equation 2.

Final Speed: 10 meters per second

Answer: A