A block of mass of 10 kg travels in the positive direction along a surface with negligible friction. The block has an initial momentum 18 km. The block collides with an object of an unknown mass that is at rest. The force exerted on the block as a function of time is shown on the graph. Which of the following best predicts the speed and direction of the block immediately after the collision? A .Speed Direction Increases Same Direction Direction
B .Speed Decreases Same Direction Direction
C .Speed Increases Opposite Direction Direction Speed
D. Decreases Opposite Direction​