B. explain why it is more difficult to move an object at rest, than to keep an object moving
with uniform motion.

because the static friction is higher than the kinetic friction

Explanation:

Inertia is resistance to motion. Object resist changing its current motion or the rest position. This is the Newton's first law of motion

apart from this as the graph shows , the force needed to move when object at rest is higher than the force to change the motion of a moving body . this is because

static friction > kinetic friction

static friction is the friction acts on a object resting on a rough surfacekinetic friction is the friction acts on an object when it is moving on a rough surface

Answer: it will take   4.36 seconds to reach her average velocity 10.69 miles/hour.explanation:   we have equation of motion ,where s is the displacement, a is the acceleration, u is the initial velocity and t is the time taken.average velocity = displacement/ time taken.average velocity = 10.69 miles/hr = 10.69*1.6*1000/(60*60) = 4.75 m/s4.75 = s/ts = 4. 1we also have acceleration = 2.18 m/s², initial velocity = 0 m/sso it will take   4.36 seconds to reach her average velocity 10.69 miles/hour.