A cat kicks a 0.43\,\text {kg}0.43kg0, point, 43, start text, k, g, end text cheese block that was initially at rest. The net force on the cheese over time is shown below. What is the cheese's speed at t =20\,\text {ms}t=20mst, equals, 20, start text, m, s, end text?
Round answer to two significant figures.
Note that time is in \text{ms}msstart text, m, s, end text.

Complete these sentences. if a roller coaster train has a potential energy of 1,500 j and a kinetic energy of 500 j as it starts to travel downhill, its total energy isj. once the roller coaster train gets closer to the bottom of the hill, its kinetic energy increases to 1,100 j, and its potential energy decreases to j. when the train reaches the bottom of the track and is traveling along the ground, its kinetic energy isj.