3. Given the scale below report the (a) precision of the instrument and (b) state the most likely measurement at the arrow. .5 1.0 Lasakokousko 4. If the velocity of an object is nonzero, can the object's acceleration be zero? Explain. 5. If the velocity of an object is zero, can the object's acceleration be nonzero? Explain. 6. If a car is traveling eastward, can it be accelerating westward? Explain. 7. The figures below show strobe photographs taken of a disk moving from left to right under different conditions. The time interval between images is constant. Taking the direction to the right to be positive, for which case is the (a) acceleration positive, (b) acceleration negative, and (c) velocity constant? For your choices, choose (1), (2), or (3), corresponding to the first, second, and third picture respectively. (1) (2) 1 (3)