l. A ball of mass 0.10 kg is being whirled in a horizontal circle at a steady speed on the end of a string. The radius of the circle is 0.50 m and the ball is completing 3.0 revolutions per second. What is the net force on the ball? A) UN B) 0.22N C) 1.8N D) 3.2N E) 18N 2. I push a sled up a hill with a pushing force F, parallel to the slope as shown in the diagram below. There is friction between the sled and the snow. The sled moves in a straight line at a steady speed. y What is the direction of the net force on the sled during this motion? A) Vertically downwards B) Uphill parallel to the slope C) Downhill parallel to the slope D) Normal to the slope and somewhat upwards E) None of the answers above are correct