Question

question 6
if you know the acceleration of a car, its initial velocity, and the time interval, which of the following can you predict?
the magnitude of the cars final velocity
all of the above
the displacement of the car
the direction of the cars final velocity

question 7
which of the following line segments on a velocity - versus time graph is physically impossible?
vertical line
straight line with positive slope
straight line with negative slope
horizontal line

question 8
motion of ball moving on ramp

Explanation:

Question 6

Step1: Recall velocity - time relation

The final velocity formula is $v = v_0+at$, where $v$ is final velocity, $v_0$ is initial velocity, $a$ is acceleration and $t$ is time - interval. So magnitude and direction of final velocity can be found.

Step2: Recall displacement - time relation

The displacement formula is $x=v_0t+\frac{1}{2}at^{2}$, so displacement can also be found.

Question 7

Step1: Understand slope of v - t graph

The slope of a velocity - time graph represents acceleration. A vertical line on a velocity - time graph implies infinite acceleration which is physically impossible. A straight line with positive slope means positive acceleration, a straight line with negative slope means negative acceleration (deceleration), and a horizontal line means zero acceleration, all of which are possible.

Answer:

Question 6: all of the above
Question 7: vertical line