3. Cart 1, shown below, is moving to the right. At the moment shown, three different forces are acting on the block. The strengths and directions of the three forces are shown in the force diagram. 6 N 18 N 9 N- Will Cart 1 speed up, slow down, or move at constant speed? Briefly explain how you know. Suppose there was another Cart (2) that was identical in size and mass to Cart 1. At the same moment sh above, Cart 2 is alongside Cart 1 and is moving at the same speed as Cart 1. What single force should be applied to Cart 2, so it continues to move side-by-side with Cart 1 or explain how you arrived at your answer. Don't forget units. ( Draw Net Force) . Draw this force (strength and direction) on the Cart above