A person pushes a large block on a horizontal ice surface in a straight line to the right with constant speed, as shown above. The mass of the block is 10kg and frictional forces between the block and the ice are negligible. However, the block has a wide cross-sectional area such that air resistance acting on the block cannot be neglected. The opposite is true for the person: air resistance on the person is negligible, but the person’s shoes do not slip on the ice. The table shows the force exerted by the person on the block for several values of constant speed. Force of person’s push (N) Constant speed of block (m/s) ±0.05 20 1.25 40 2.51 60 3.73 80 5.00 (a) A student claims that the data show that the magnitude of the force of air resistance is proportional to the speed of the object, within experimental uncertainty. Use physics principles to explain whether the claim is correct. 0 / 10000 Word Limit Question 2 (b) As the person pushes the block, the person moves with the same constant speed as the block. Consider the scenario in which the person’s speed is 5.00 m/s. i. On the dot below, which represents the person, draw and label the forces (not components) exerted on the person. Each force must be represented by a distinct arrow starting on, and pointing away from, the dot. The figure presents a large dot. 0 / 10000 Word Limit Question 3 ii. The person now stops and releases the block. Determine the magnitude and direction of the block’s acceleration at the instant the block is released.